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Currency & unitsUSD · Imperial

Calculation currency

Measurement units

Using USD and Imperial. You can change either choice.

Currency changes the unit of your amounts, not their value. No exchange rate or country-specific tax, benefit, or lending rule is applied. Money results and loan schedules retain the calculators’ two-decimal precision; this does not apply local cash-rounding rules.

Measurement changes convert valid existing quantities. Incomplete entries stay as typed; finish them using the units shown. Other units stay as labeled. Enter numbers as 1,234.56; a decimal comma is not supported.

Initial suggestions use only your browser’s language region. Choices are saved on this browser; no location lookup is used.

Cycling Calculators

Compare bicycle gearing, wheel rollout, speed and cadence. Choose a tool below for instant results, formulas, and examples.

Bicycle Gear CalculatorCompare bike chainrings and cassettes, calculate gear inches and speed, or find gears for your target cadence. Use tire presets or measured rollout and export a gear chart.