Online Calculator Tools

Estimate how long a battery will last based on capacity and power draw.

Calculate the safe discharge current of a battery based on its C-rating.

Scale recipe ingredients by a multiplier to adjust serving sizes.

Calculate how long it takes to download a file at a specific speed.

Convert dress sizes between different international standards (US, UK, EU).

Calculate capacitance, charge, or voltage.

Calculate the heat index (feels-like temperature) based on air temperature and humidity.

Calculate the volume of rain water based on rainfall amount and catchment area.

Calculate the effective focal length of a lens on a crop sensor camera.

Calculate the density of air based on temperature, pressure, and dew point.

Calculate the wind chill factor based on temperature and wind speed.

Estimate the carbon footprint for various activities or travel.