Calculators

Calculates the difficulty of a Dungeons & Dragons 5e combat encounter based on party level and monster experience points (XP).

This calculator determines the gear ratio of a bicycle based on the chainring size and the cog size on the cassette. It helps cyclists understand the mechanical advantage and the effective distance traveled per pedal revolution.

Calculates target split times for different segments of a race or run based on overall goal time.

Calculates voltage, current, or resistance in an electrical circuit using Ohm's Law (V=IR).

Calculates terms, sums, or the formula for an arithmetic sequence.

Calculates maintenance intravenous fluid rates for children based on the Holliday-Segar method.

Converts amounts between different currencies based on exchange rates.

Calculates the total amount of fabric needed for a sewing or crafting project, considering dimensions and seam allowances.

This calculator converts between nautical miles, statute miles, kilometers, and meters.

A tool for performing arithmetic operations on measurements in feet and inches, including fractions and decimals.