Free · No sign-up · Client-side calculations

Simple numbers. Better business decisions.

SmallBizMath is a set of free, fast calculators for pricing your services and evaluating promotions — built for freelancers, service businesses and ecommerce sellers.

Price your services

Calculate the hourly rate, project quote or consulting day rate you actually need to charge.

Evaluate discounts & promotions

Compare discounts, BOGO and bundles by real contribution profit, not by how big the discount looks.

Popular calculators

Service Pricing Calculator

Find your sustainable hourly rate from income, overhead and utilization.

Freelance Hourly Rate Calculator

A simplified rate calculator for freelancers.

Project Pricing Calculator

Turn an hourly rate into a fixed project quote.

Promotion Profit Calculator

Compare every promotion type side by side by real profit.

Discount Profit Calculator

Find the maximum discount you can afford to offer.

BOGO Profit Calculator

See the real profit behind a Buy One Get One Free deal.

How the math works

Every calculator on SmallBizMath shows its formulas, assumptions and a worked example — nothing is a black box. Read the full methodology for how pricing and promotion math is calculated, rounded and what it deliberately leaves out.

Free calculators for smarter business decisions. All calculations run in your browser — nothing you enter is sent to a server.