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Business and personal maths, solved in seconds.
Free calculators for business and personal finances across the US and Canada. Margin, payroll, GST/HST, state sales tax and mortgages — with the right rates for the country you actually operate in.
Currency converter
Loading1 USD = 1.3952 CAD
🇺🇸 US Dollar → 🇨🇦 Canadian Dollar
Saved rates · 8 Aug 2026
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Check a price, plan your sales target, or understand your costs. Choose a question and work it out with your own numbers.
Profit Margin Calculator
What percentage of each sale do I keep?
Use calculatorMarkup Calculator
What price covers my cost and markup?
Use calculatorBreak-Even Calculator
How many sales cover my fixed costs?
Use calculatorDiscount Calculator
What is the price after a discount?
Use calculatorNet Profit Calculator
What remains after all my business costs?
Use calculatorCustomer Acquisition Cost (CAC) Calculator
How much does each new customer cost?
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22 calculators, each on its own page with the formula, a worked breakdown and answers to the questions people actually ask.
Guides to your next calculation
Work through the rules and examples, then use a free calculator with your own numbers.
Canada mortgage stress test: qualifying rate and examples
Understand the 5.25% floor, contract rate plus 2 percentage points, worked payment examples and the uninsured straight-switch exception.
Read the guide →Break-even point formula: units, sales revenue and examples
Calculate break-even in units and sales dollars. See a worked example, whole-unit rounding and common cost mistakes, then try the free calculator.
Read the guide →Sales tax nexus: physical presence, economic nexus and next steps
Learn physical versus economic sales tax nexus, why state thresholds differ, and how to check marketplace sales. Includes an official Texas example.
Read the guide →Live results
Every figure recalculates as you type. No submit button, no waiting, no account.
Two countries, one site
The header toggle sets currency, terminology and default tax rates everywhere you go.
Rates in one place
All federal, state and provincial rates live in a single config file that is reviewed when rates change.
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