Length
Use meters as the canonical base for mm, cm, km, in, ft, yd, and mi.
055 · UNIT & CALCULATOR
Length, Area & Volume Converter
Convert length, area, pyeong/square meters, and volume units and compare common units at a glance.
LOCALCALCULATE IN YOUR BROWSER
LOCALValues and conversion results are calculated only in this browser and are not sent to or stored on a server.
Quick units
Display settings · Precision
6
RESULT · Conversion result
100cm
1 m → cm
Common Units
1,000Millimeter · mm
100Centimeter · cm
1Meter · m
0.001Kilometer · km
39.370079Inch · in
3.28084Foot · ft
HOW TO USE
How to use
- 01
Choose Length, Area, or Volume.
- 02
Enter a value and select the From and To units.
- 03
Review the main conversion and common-unit equivalents together.
- 04
In Area mode, use Pyeong and square meters for quick comparison.
- 05
Adjust display precision or copy the current result when needed.
CONVERSION GUIDE
Separating dimensions prevents common conversion mistakes
Length, area, and volume use separate canonical bases—m, m², and m³—so units never cross dimensions.Area
Use square meters for pyeong, ft², acre, hectare, and other area units.
Volume
Use cubic meters for mL, L, cm³, ft³, US gallons, and other volume units.
IMPORTANT NOTES
Important notes
- Length, area, and volume are different dimensions, so each category uses its own conversion factors.
- The SI area unit is m² and the SI volume unit is m³; liter is a volume unit.
- Pyeong is not an SI unit; this tool uses 1 pyeong = 400/121 m².
- Rounding is applied only for display; the internal calculation value is preserved.
- For legal surveying, transactions, or official submissions, follow the relevant authority’s rules.
FAQ
Frequently asked questions
01Is 1 m² the same as 1 m?+
No. Meter measures length while square meter measures area.
02How many mL are in 1 L?+
1 L equals 1000 mL. Also, 1 mL equals 1 cm³.
03Can I convert Pyeong and square meters?+
Yes. Select Pyeong and m² directly in Area mode for two-way conversion.
04Can I see several units at once?+
Yes. Common Units shows up to six representative conversions for the current value.
05Why are decimal digits shortened?+
Internal calculation and display precision are separated so results stay readable without repeatedly rounding the stored value.