Length, weight, and temperature, converted instantly
Convert between metric and imperial units across length, weight, and temperature — pick a category, choose your units, and get a live result as you type.
Pick a category
Length, weight, or temperature.
Choose units
Select what you're converting from and to.
Enter a value
The result updates live, or swap units with one click.
Why is temperature handled differently from length and weight?
Length and weight scale from zero (a simple multiplication factor works), but Celsius/Fahrenheit/Kelvin don't share a zero point — converting between them needs their own formulas, not a factor.
How many decimal places does the result show?
Up to 6 significant decimal places, trimmed of trailing zeros for readability.
Calculate the exact number of days, weeks, months, and years between two dates, with an optional business-days-only count. All calculation happens in your browser.
Convert colors between HEX, RGB, and HSL instantly, and generate shade, complementary, analogous, and triadic palettes from any base color. All processing happens in your browser.
Pick any color from your screen, an uploaded image, or a swatch, and get instant HEX, RGB, and HSL values. Uses the browser's native EyeDropper API where available. All processing happens in your browser.
Convert Unix epoch timestamps to human-readable dates and back. Live current-timestamp ticker, auto-detects seconds vs milliseconds, outputs ISO 8601, UTC, local time, and relative ("2 hours ago") formats. Perfect for debugging logs, APIs, and databases.