Business 9 tools
Pricing and profitability
Connect cost, price, contribution, margin, and break-even volume before making a pricing decision.
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Practical calculators for business, finance, math, and everyday decisions—with the formula and context you need to understand every result.
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Return on investment
Total gain
$15,000
Investment cost
$10,000
ROI
50%
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Business
Plan pricing, costs, profitability, and day-to-day operating decisions.
14 live · 14 total
Marketing
Measure campaign efficiency, acquisition costs, traffic, and conversion performance.
15 live · 15 total
Ecommerce
Improve store margins, pricing, order economics, and inventory decisions.
12 live · 12 total
SaaS
Understand recurring revenue, retention, growth efficiency, and unit economics.
13 live · 13 total
Freelance
Set sustainable rates, estimate projects, and manage independent income.
8 live · 8 total
Finance
Explore cash flow, interest, savings, loans, and investment scenarios.
20 live · 20 total
Math
Solve percentage, geometry, algebra, and measurement problems with transparent steps.
9 live · 9 total
Everyday
Estimate common costs, quantities, dimensions, travel, energy, and household decisions.
9 live · 9 total
Follow the decision chain
Calculator topic hubs
Individual formulas answer one question. Topic hubs show how the metrics interact, which assumptions matter, and where a clean-looking result can mislead.
Business 8 tools
Cash flow and growth
Measure growth, operating performance, working-capital pressure, and investment recovery as one connected system.
Explore the topic Marketing 9 tools
Paid advertising economics
Trace the paid-media chain from impressions and clicks to acquisitions, revenue, contribution, and profit.
Explore the topic Marketing 9 tools
Funnel and lifecycle metrics
Measure how attention becomes engagement, leads, customers, and durable acquisition economics.
Explore the topic Ecommerce 8 tools
Ecommerce unit economics
Connect order value, discounts, shipping, returns, acquisition, and margin to the contribution created by each order.
Explore the topic Ecommerce 8 tools
Inventory and fulfillment
Balance availability, working capital, reorder timing, shipping cost, and return pressure.
Explore the topicGo beyond the answer
Popular formula guides
6 min
Margin vs. Markup: Formulas, Differences, and Pricing Examples
Understand the difference between profit margin and markup, convert between them, and avoid common pricing mistakes.
Read guide →6 min
ROI vs. ROAS: How to Measure Marketing Returns Correctly
Learn when to use ROI or ROAS, what each metric includes, and how margin changes the break-even return on ad spend.
Read guide →7 min
Customer Acquisition Cost: A Practical CAC Measurement Guide
Build a consistent CAC calculation, understand blended and channel CAC, and connect acquisition cost to lifetime value and payback.
Read guide →8 min
SaaS Metrics Guide: MRR, ARR, Churn, NRR, and Rule of 40
Understand the core SaaS metrics, how they connect, and the definition choices that make recurring-revenue reporting reliable.
Read guide →Calculator library
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Business
ROI Calculator
Measure the percentage return on an investment by comparing its gain with its original cost.
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Profit Margin Calculator
Find the percentage of revenue left after costs and understand how efficiently a sale creates profit.
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Markup Calculator
Calculate how much a selling price exceeds cost, expressed as a percentage of that cost.
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Break-Even Calculator
Estimate how many units you must sell for contribution profit to cover fixed costs.
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Commission Calculator
Calculate commission earnings from a sale amount and percentage rate.
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ROAS Calculator
Measure the revenue generated for every dollar spent on advertising.
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Customer Acquisition Cost Calculator
Calculate the average sales and marketing cost required to acquire one new customer.
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CPM Calculator
Calculate advertising cost per one thousand impressions for a campaign or placement.
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CPC Calculator
Calculate the average advertising cost for each click generated by a campaign.
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Conversion Rate Calculator
Find the percentage of visitors who complete a desired action, such as a purchase or signup.
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Cash Flow Calculator
Calculate net cash flow by subtracting cash outflows from cash inflows.
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Operating Margin Calculator
Measure operating income as a percentage of revenue before interest and taxes.
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Revenue Growth Calculator
Calculate the percentage change in revenue between two comparable periods.
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Labor Cost Calculator
Estimate fully loaded annual labor cost beyond an employee's base salary.
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Inventory Turnover Calculator
Calculate how many times average inventory is sold or used during a period.
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Payback Period Calculator
Estimate how many years of steady cash flow are needed to recover an investment.
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Contribution Margin Calculator
Calculate the share of revenue remaining after variable costs.
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CTR Calculator
Calculate click-through rate from ad or link clicks and impressions.
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CPA Calculator
Calculate average advertising cost for each acquisition or conversion.
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Email Open Rate Calculator
Measure opens as a percentage of delivered marketing emails.
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Email Click Rate Calculator
Calculate the percentage of delivered emails that generated a click.
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Bounce Rate Calculator
Calculate the percentage of sessions that ended without the engagement you define.
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Engagement Rate Calculator
Measure interactions as a percentage of reach for social or content campaigns.
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Lead-to-Customer Rate Calculator
Calculate the percentage of qualified leads that became customers.
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Average Order Value Calculator
Calculate average revenue generated by each ecommerce order.
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Cart Abandonment Rate Calculator
Measure the percentage of initiated shopping carts that did not become purchases.
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Discount Calculator
Calculate the sale price after applying a percentage discount.
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Shipping Cost Per Order Calculator
Calculate average outbound shipping spend for each fulfilled order.
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Ecommerce Return Rate Calculator
Calculate the percentage of sold items that customers returned.
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Reorder Point Calculator
Estimate the inventory level that should trigger a replenishment order.
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Customer Lifetime Value Calculator
Estimate customer lifetime revenue from order value, purchase frequency, and lifespan.
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MRR Calculator
Calculate normalized monthly recurring revenue from customers and average monthly revenue.
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ARR Calculator
Annualize monthly recurring revenue for a subscription business.
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SaaS Churn Rate Calculator
Calculate the percentage of starting SaaS customers lost during a period.
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LTV to CAC Ratio Calculator
Compare customer lifetime value with customer acquisition cost.
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SaaS CAC Payback Calculator
Estimate how many months of gross profit are needed to recover customer acquisition cost.
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Net Revenue Retention Calculator
Calculate recurring revenue retained after expansion, contraction, and churn.
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SaaS Rule of 40 Calculator
Combine recurring-revenue growth and profit margin into the SaaS Rule of 40 score.
Calculate now Freelance
Freelance Hourly Rate Calculator
Estimate the hourly rate needed to cover income goals and business expenses.
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Freelance Project Rate Calculator
Build a project quote from time, hourly value, direct expenses, and contingency.
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Billable Utilization Calculator
Calculate the percentage of working time spent on billable client work.
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Freelance Tax Set-Aside Calculator
Estimate how much freelance income to reserve using a chosen tax percentage.
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Effective Hourly Rate Calculator
Calculate actual project revenue earned per hour of total time spent.
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Freelance Retainer Calculator
Estimate a monthly retainer from reserved hours, hourly value, and a retainer discount.
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Compound Interest Calculator
Project a balance using principal, interest rate, time, and compounding frequency.
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Simple Interest Calculator
Calculate a future balance when interest is earned only on the original principal.
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Loan Payment Calculator
Estimate the fixed monthly principal-and-interest payment for an amortizing loan.
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Savings Goal Calculator
Estimate the monthly contribution needed to close a savings gap by a target date.
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Inflation Calculator
Estimate the future cost of an item after compound inflation.
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Debt-to-Income Ratio Calculator
Calculate monthly debt payments as a percentage of gross monthly income.
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Gross Profit Calculator
Calculate gross profit by subtracting cost of goods sold from revenue.
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Net Profit Calculator
Calculate net profit or loss after subtracting total expenses from revenue.
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Target Profit Calculator
Estimate the unit sales needed to cover fixed costs and reach a target operating profit.
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Payroll Burden Calculator
Calculate employer costs above base payroll as a percentage of base wages.
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Cost Per Lead Calculator
Calculate marketing cost per lead from spend and qualified lead volume.
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Lead Value Calculator
Calculate average revenue generated per lead in a defined cohort.
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Revenue Per Visitor Calculator
Calculate average revenue generated for each website visitor or session.
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Unsubscribe Rate Calculator
Calculate the percentage of delivered emails that generated an unsubscribe.
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Gross Merchandise Value Calculator
Calculate gross merchandise value from order count and average order value.
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Repeat Purchase Rate Calculator
Calculate the percentage of customers who made more than one purchase.
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Inventory Days Calculator
Estimate how many days of cost of goods sold are held in average inventory.
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Economic Order Quantity Calculator
Estimate the order quantity that balances annual ordering and inventory holding costs.
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Average Revenue Per User Calculator
Calculate recurring revenue per active customer or account for a consistent period.
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Gross Revenue Retention Calculator
Calculate recurring revenue retained before expansion from an opening customer cohort.
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SaaS Quick Ratio Calculator
Compare new and expansion MRR with contraction and churned MRR.
Calculate now SaaS
Burn Multiple Calculator
Calculate cash burned for each dollar of net new annual recurring revenue.
Calculate now SaaS
Cash Runway Calculator
Estimate how many months current cash can fund a constant monthly net burn.
Calculate now Freelance
Freelance Day Rate Calculator
Estimate the minimum day rate needed to cover an annual income goal and business expenses.
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APY Calculator
Convert a nominal annual interest rate and compounding frequency into annual percentage yield.
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Percentage Change Calculator
Calculate the percentage increase or decrease from an original value to a new value.
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Percentage Calculator
Calculate a percentage of any number using the standard percentage formula.
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Percentage Difference Calculator
Calculate the relative difference between two values without treating either value as the starting point.
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Slope Calculator
Calculate the slope of a line from two coordinate points.
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Pythagorean Theorem Calculator
Calculate the hypotenuse of a right triangle from the two perpendicular side lengths.
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Circle Area Calculator
Calculate the area of a circle from its radius.
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Triangle Area Calculator
Calculate triangle area from a base length and perpendicular height.
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Cylinder Volume Calculator
Calculate the volume of a circular cylinder from radius and height.
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Exponent Calculator
Raise a base number to any numeric exponent.
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Square Root Calculator
Calculate the principal square root of a nonnegative number.
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Tip Calculator
Calculate the total bill including tip and divide it evenly among a group.
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Sales Tax Calculator
Calculate a purchase total after applying a user-entered sales tax rate.
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Fuel Cost Calculator
Estimate trip fuel cost from distance, fuel efficiency, and fuel price.
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Gas Mileage Calculator
Calculate miles per gallon from distance traveled and fuel used.
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Square Footage Calculator
Calculate the area of a rectangular floor, wall, lot, or material section in square feet.
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Concrete Volume Calculator
Estimate concrete volume in cubic yards from slab length, width, and depth.
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Electricity Cost Calculator
Calculate electricity cost from energy use and the price per kilowatt-hour.
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Unit Price Calculator
Calculate cost per item, weight unit, volume unit, or other quantity.
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Speed Calculator
Calculate average speed from distance traveled and elapsed time.
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Mortgage Calculator
Estimate a monthly mortgage payment including principal, interest, property tax, home insurance, and HOA dues.
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Mortgage Amortization Calculator
Calculate a fixed mortgage payment and the total principal, interest, and number of payments across the loan term.
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Home Affordability Calculator
Estimate a home-price ceiling from income, monthly debts, down payment, mortgage terms, taxes, insurance, and a chosen debt-to-income limit.
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Mortgage Refinance Calculator
Compare current and proposed mortgage payments, closing-cost break-even time, and projected remaining interest.
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Down Payment Calculator
Convert a down-payment percentage into cash required, estimated mortgage amount, and starting loan-to-value ratio.
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Loan-to-Value Calculator
Calculate mortgage loan-to-value ratio, estimated owner equity, and the equity percentage from balance and property value.
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Auto Loan Calculator
Estimate a monthly car payment, amount financed, sales tax, total payments, and interest from vehicle price and loan terms.
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Investment Calculator
Project an investment balance from starting capital, monthly contributions, annual return, and time, with contributions and growth separated.
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Retirement Calculator
Estimate the savings needed at retirement to fund a monthly income gap over a chosen period and assumed return.
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Salary Calculator
Convert annual salary into hourly, daily, weekly, biweekly, and monthly gross pay using a chosen work schedule.
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Interest Rate Calculator
Estimate the fixed annual interest rate implied by a loan amount, monthly payment, and repayment term.
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401(k) Calculator
Project a workplace retirement-account balance from current savings, salary-based employee and employer contributions, return, and time.
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