Business Calculators

Free business calculators for ROI, profit margin, cash flow, break-even, CAC, LTV and markup — estimate any business metric in seconds.

Margins, break-even, customer costs and return on spend. Each calculator separates fixed from variable costs, shows the formula with a worked example, and flags the assumptions (like constant unit economics) that small businesses most often get wrong.

Business ROI

Calculate return on investment

Profit Margin Calculator

Calculate profit margin

Customer LTV

Calculate customer lifetime value

CAC Calculator

Customer acquisition cost

Conversion Rate

Calculate conversion rate

Churn Rate Calculator

Calculate customer churn

ROAS Calculator

Return on ad spend

Burn Rate Calculator

Calculate startup burn rate

MRR Calculator

Calculate monthly recurring revenue

Net Promoter Score (NPS) Calculator

Calculate Net Promoter Score

Freelance Rate Calculator

Calculate hourly freelance rate

Pricing Calculator

Calculate optimal price

Inventory Turnover

Calculate inventory turnover ratio

Break-Even Revenue

Calculate break-even revenue

Payback Period

Calculate investment payback

Depreciation Calculator

Calculate straight-line depreciation

SaaS Unit Metrics Calculator

Calculate key SaaS metrics: ARPU, LTV, CAC, payback period

Break-Even Point Calculator

Calculate how many units you must sell to break even

Invoice Due Date & Late Fee

Calculate invoice due date and late payment penalty

True Employee Cost

Calculate the full cost of an employee including benefits

Markup vs Margin

Convert between markup percentage and margin

Working Capital Calculator

Current assets minus current liabilities

Cash Flow Statement Calculator

Net cash flow over a period

Revenue per Employee

Revenue efficiency per employee

CAC Payback Period

Months to recover customer acquisition cost

Business Valuation (Revenue Multiple)

Quick valuation using revenue or EBITDA multiples

Gross Margin Calculator

Gross profit margin from revenue and COGS

Target Price from Margin

Selling price needed for a target margin

Subscription LTV Calculator

Lifetime value of a subscription customer

Cash Conversion Cycle Calculator

Days cash is tied up: DIO + DSO − DPO

Market Share Calculator

Your share of the total market

Average Order Value Calculator

AOV from revenue and order count

Customer Lifetime Value Calculator

Revenue per customer from ARPU, margin, and churn

CSAT Score Calculator

Customer satisfaction percent from survey counts

Conversion Funnel Calculator

Step-to-step and overall conversion rates

A/B Test Significance Calculator

Z-score for a two-variant conversion test

Project Bid Calculator

Bid price from cost, contingency, and margin

Retainer Value Calculator

Contract value with a term discount applied

About CalcProMaster calculators

CalcProMaster is a free library of 1206 online calculators across 20 categories — finance, health, math, business, construction, engineering, conversion, education and more. Every calculator runs entirely in your browser: no sign-up, no paywall, and no data leaves your device.

What makes these calculators different is transparency. Each tool shows the exact formula it uses and a step-by-step breakdown of how your inputs become the result, so you can verify the math instead of trusting a black box. Result interpretation, common mistakes, assumptions and limitations are documented on every calculator page, alongside worked examples and an FAQ. Health and finance tools cite the standard formulas they follow — Mifflin-St Jeor for calorie needs, standard amortization for loans — and state plainly where a calculator's answer should be confirmed with a professional.

The guides library goes deeper on the calculations people search for most: percentage and discount math, loan EMI and amortization, income-tax brackets, calorie and macro planning, concrete volumes and more — each with the formula, worked examples and links to the matching calculator. The glossary defines the terminology in plain language, and the public formula QA dashboard shows the verification status of every calculator's math.

Popular starting points: loan EMI calculator, BMI calculator, percentage calculator, random number generator, and concrete calculator — or browse a category above to find the tool you need.

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