Conversion

Convert RMS voltage, current, peak voltage, or AC power factor values into watts with clear formulas and beginner-friendly notes.

Convert radiation dose, exposure, activity, and dose rate units by measurement family, with a photon-only exposure bridge helper.

Convert pair, dozen, score, gross, and more into single items or other counting units with all equivalents shown at once.

Convert CSS pixels to em using the right reference font size for font-size, padding, width, and more.

Convert ppm to mg/L or mg/L to ppm with a water shortcut or custom liquid density, plus the exact equation and assumption note.

Calculate ppm, percent, ppb, and mg/L with the right basis, including water-like and density-based liquid conversions.

Convert watts, kilowatts, megawatts, horsepower, Btu/h, and more with clear horsepower type differences shown.

Convert pennies to dollars or dollars to pennies, with roll counts, loose pennies, and a simple bank box estimate.

Convert sheets, quires, reams, bundles, bales, and printer’s reams with modern or historical count rules.

Convert nickels to dollars or dollars to nickels, and see cents, full $2 rolls, and leftover nickels fast.