In development · Waitlist open · konwerter (Polish): converter

Nº 01 / Unit converter and reference

Units, converted exactly.

A fast, private converter and reference. Type a value, read the result, and see the constant behind it. Built to give the answer and then get out of the way.

ConverterExample · interface preview
LengthMassTempVolumeSpeedArea
From
12.5km
To
7.76714mi
1 mi = 1.609344 kmexact
Precision6 digits
72 kg → 158.73 lb20 °C → 68 °F2 l → 0.5283 US gal100 km/h → 62.14 mph1 ha → 2.471 ac

01 / Converters

Six converters. One rule each.

01

Length

1 mi = 1.609344 km

Metric, imperial and nautical, from millimetres to miles.

02

Mass

1 lb = 0.45359237 kg

Grams to pounds, stones and ounces.

03

Temperature

°F = °C × 9/5 + 32

Celsius, Fahrenheit and Kelvin, with the formula in view.

04

Volume

1 US gal = 3.785411784 l

Litres, millilitres, gallons and cups, with US and UK kept apart.

05

Speed

1 kn = 1.852 km/h

Kilometres per hour, miles per hour, knots and metres per second.

06

Area

1 ac = 4046.8564224 m²

Square metres, hectares, acres and square feet.

02 / Show the work

Every answer shows its constant.

A result you cannot check is just a guess. konwerter is designed to name the constant it used, say whether it is exact by definition, and show how the number was rounded.

Worked example12.5 km → mi

Input
12.5 km
Constant
1 mi = 1.609344 kmexact
Calculation
12.5 ÷ 1.609344
Rounding
6 significant digits
Result
7.76714 mi

03 / Design goals

Nothing leaves your device.

Design goals, not claims. The product is in development.

  1. 01

    Instant

    The answer appears as you type. No page loads, no spinners, no waiting on a server.

  2. 02

    Private

    Conversion happens in your browser. The goal: no account, no upload, nothing sent anywhere.

  3. 03

    Exact

    Defined constants, visible rounding and the formula on screen, so you can trust the number.

  4. 04

    Quiet

    One input, one result and nothing competing with them. The interface stays out of the way.

04 / Waitlist

Be first
in line.

konwerter is in development. Leave your address and we will write once, when it is ready to use.

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