Weight Converter

How weight conversion works

All conversions use precise, standard conversion factors (e.g., 1 kg = 2.20462 lb) — enter a value in any supported unit and every other unit updates instantly.

Metric vs. imperial weight

Kilograms and grams are metric units used worldwide; pounds, ounces, and stone are common in the US and UK. This converter bridges both systems in one tool.

Common Mistakes to Avoid

Confusing mass (weight) with volume

Solution:

Weight (kg, lb) and volume (liters, cups) are different measurements — this tool only converts mass/weight units.

Mixing up stone with pounds

Solution:

1 stone = 14 pounds — a common source of error when converting UK body-weight figures.

Rounding too early in multi-step conversions

Solution:

Let the converter handle full-precision math rather than rounding an intermediate value by hand.

Frequently Asked Questions

Kilograms, grams, pounds, ounces, stone, and metric/US tons.

Yes — it uses standard, precise conversion factors for every unit pair.

No — all conversion happens locally in your browser.

Yes — select stone as the input unit and kilograms as the output, or view all units at once.

Free Weight Converter

Convert weight between kilograms, grams, pounds, ounces, stone, and tons instantly. Type a value in any unit and see every other unit update automatically.

Common Uses

Cooking and recipe conversions
Fitness and body-weight tracking
Shipping and package weight
Scientific and engineering calculations