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About this tool
Convert 71 units across length, weight, temperature, area, volume, speed, data and time.
The Unit Converter covers 71 units in eight categories — length, weight, temperature, area, volume, speed, data and time. Each linear category stores one factor per unit (its size in the category's base unit), so every conversion is the same multiply-then-divide; temperature is pivoted through Celsius instead, because its scales have an offset as well as a scale factor. The factors are the exact legal definitions rather than rounded ones: 1 in = 0.0254 m and 1 lb = 0.45359237 kg from the 1959 international yard and pound agreement, 1 acre = 4840 sq yd = 4046.8564224 m², 1 US gallon = 231 in³ = 3.785411784 L, and 1 tola = 180 troy grains = 11.6638038 g. Below the converter, your value is listed in every unit of the category at once, and each row can be tapped to make that unit the target. All of the arithmetic runs in JavaScript on your own device.
Open Unit Converter on AltFTool — it loads instantly in your browser.
Pick a category — Length, Weight, Temp, Area, Volume, Speed, Data or Time — then set the From and To units, or tap a common pair such as sq ft → sq yd.
Type the value; the answer updates on every keystroke, and the line beneath it names the factors used, so 170 cm reads as 5.57742782 ft.
Take it with Copy answer for the bare number or Copy as text for the whole line, press Save to keep it in this browser, and read the table below for your value in every unit of that category.
Length and weight use the 1959 international yard and pound agreement — 1 in = 0.0254 m, 1 lb = 0.45359237 kg. Area factors are the squares of those same numbers, so 1 acre resolves to 4046.8564224 m² and 1 cent to exactly 435.6 sq ft.
A table under the converter shows your value in all 10 length, 12 area or 13 volume units at once. Select any row to make that unit the target, or use Copy table to take the full list with you.
Gaj (square yard), cent, guntha, quintal and tola each carry their exact factor and a note saying where the unit is used. Bigha is deliberately absent: it has no standard size, so one factor would be wrong for most readers.
Auto aims for nine significant digits and trims trailing zeros, stopping at 12 decimal places — so a result below about 0.0001 carries fewer than nine; the Decimals control fixes the output at up to eight places instead. A value too small to write out switches to exponential notation rather than rounding to a misleading 0.
1,50,000 and 1 000 are both understood, so a figure copied from a document converts without retyping. Press Enter in the value box to save the conversion.
Each answer is one multiplication and one division in your browser — there is no server call. Saved conversions go to this browser's localStorage, keep the most recent 25, and Clear all removes them.
Exactly 9 sq ft. Gaj is the square yard, and 1 sq yd = 0.83612736 m² while 1 sq ft = 0.09290304 m². In the tool, pick Area, set From to Square yard / gaj and To to Square foot; the sq ft → sq yd chip does the reverse.
1 cent = 435.6 sq ft and 1 guntha = 1,089 sq ft. A cent is 1/100 of an acre and a guntha is 1/40, and an acre is 4046.8564224 m² = 43,560 sq ft. Both are in the Area list, each with a note on which states use them.
Because bigha has no standard size — it differs by state and often by district, so a single factor would give most readers a wrong answer. Convert through acre, guntha or sq ft using the size your own land records state.
Divide by 30.48, since 1 ft = 0.3048 m = 30.48 cm. Choose Length, then the cm → ft chip: 170 cm returns 5.57742782 ft. Feet and inches are separate units here, so the answer is a decimal number of feet rather than feet-and-inches.
2.20462262 lb as this converter shows it, from 1 ÷ 0.45359237 kept to nine significant digits. Pick Weight and the kg → lb chip; lb → kg reverses it.
(°F − 32) × 5 ÷ 9. Every temperature is routed through Celsius, so Fahrenheit to Kelvin becomes (°F − 32) × 5 ÷ 9 + 273.15. Entering 98.6 °F returns 37 °C, and the formula in use is printed under the answer.
Because two different gigabytes are in play. Drive makers count 1 TB as 1000⁴ bytes; Windows reports that same space in gibibytes of 1024³ bytes. Converting 1 TB to GiB in the Data category gives 931.322575, which is the number you see.
11.6638038 g. The Indian tola is defined as 180 troy grains, and a grain is 64.79891 mg. The troy ounce used in bullion pricing is 480 grains = 31.1034768 g; both are in the Weight list.
Auto aims for nine significant digits and strips trailing zeros, so 1 m reads as 3.2808399 ft rather than 3.280839900. It never prints past 12 decimal places, so a result below about 0.0001 carries fewer than nine: 1 sq ft in acres shows as 0.000022956841, which is eight, and it falls to five just above 0.00000001 — below that the answer switches to exponential notation. Whole numbers are never shortened, so a result in the billions is printed in full. The Decimals control fixes the output at 0, 1, 2, 3, 4, 6 or 8 places instead, and that choice is remembered in this browser.
Nothing is uploaded — the conversion is arithmetic in your browser, with no server call. Two things are written to this browser's localStorage: the conversions you press Save on (or Enter in the value box), newest first and capped at the most recent 25, which Clear all deletes; and your Decimals setting, saved the moment you change it so it survives a reload. Clear all leaves that setting alone — clearing the site's data in your browser removes both.
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