Engineering Unit Converter
Length, area, volume, weight, force, pressure and temperature, including Nepali units.
| Unit | Value |
|---|
Free tool by EngineeringNepal.com.np · Results are for guidance; check critical figures with a qualified engineer.
One converter for everyday engineering units
Engineering work in Nepal mixes metric and imperial units all the time. Drawings are in metres and millimetres, the site talks in feet and inches, sand is bought in cft, steel in kg or quintal, and old reports quote pressure in kg/cm² while codes use MPa. Pick a quantity, type a value, and every other unit in that group is shown at once.
Useful conversions to remember
| From | To | Multiply by |
|---|---|---|
| 1 m | feet | 3.2808 |
| 1 m³ | cft | 35.3147 |
| 1 m² | sq ft | 10.7639 |
| 1 MPa (N/mm²) | kg/cm² | 10.197 |
| 1 kN | kgf | 101.97 |
| 1 t/m² | kN/m² | 9.807 |
| 1 haat | inches | 18 |
| 1 tola | grams | 11.66 |
Frequently asked questions
How do I convert concrete strength from MPa to kg/cm²?
Multiply by about 10.2. So M20 concrete (20 N/mm²) is roughly 204 kg/cm², and Fe500 steel (500 N/mm²) is about 5,100 kg/cm².
What is bearing capacity 150 kN/m² in t/m²?
Divide by 9.807: 150 kN/m² ≈ 15.3 t/m². Choose Pressure / stress above and select kPa to see all equivalents.
For land units in detail, use the Jagga Napi converter.
How to use the unit converter
- Choose the quantity first: length, area, volume, mass, force, pressure and stress, density and unit weight, flow rate or temperature.
- Type the value. Commas are ignored, so 1,25,000 and 125000 give the same result.
- Pick the unit you are converting from. The table then shows the same value in every other unit of that group, and the row in bold is your input.
- Copy the number you need with the right number of decimals for the job. Site quantities rarely need more than two or three.
The converter works through one base unit per group (metre, square metre, cubic metre, kilogram, newton, pascal and so on), so the results in a group always agree with each other. Nepali land units use 1 ropani = 508.737 m² (5,476 sq ft) and 1 kattha = 338.632 m² (3,645 sq ft); the haat is taken as 18 inches, the tola as 11.6638 g and the dharni as 2.3925 kg.
Worked examples with Nepal site values
1. Concrete and sand: m³ and cft
A staircase needs 1.45 m³ of concrete. Choose Volume, type 1.45 and select cubic metre: the converter shows about 51.21 cft. Going the other way, a tipper load of sand sold as 100 cft is 2.832 m³. This matters when a supplier quotes per cft and your estimate is in m³: multiply the m³ quantity by 35.31 before comparing rates. For the full method, see 1 cubic metre to cft.
2. Soil bearing capacity: kN/m² to t/m² and kg/cm²
A soil report gives an allowable bearing capacity of 150 kN/m². Choose Pressure / stress, type 150 and select kPa (kN/m²). The table shows about 15.30 t/m² and 1.53 kg/cm². Some older reports and drawings use t/m² while newer ones use kN/m², so convert before sizing a footing with the isolated footing guide.
3. Concrete strength: MPa to kg/cm²
M20 concrete has a characteristic strength of 20 N/mm² (MPa). Converted, that is about 203.9 kg/cm². Use this when comparing a cube test report in N/mm² with an older specification in kg/cm².
4. Unit weight: kN/m³ and kg/m³
Load calculations use 25 kN/m³ for reinforced concrete, which the converter shows as about 2,549 kg/m³. Steel at 7,850 kg/m³ is about 76.98 kN/m³. A common slip is to treat 1 kN as 100 kg; it is 101.97 kg, a 2% difference that adds up on large loads.
5. Water: litres, cft, gallons and MLD
A 2,000 litre roof tank holds 2 m³, or about 70.63 cft. A 500 litre tank is about 110 UK gallons but 132 US gallons, so check which gallon a pump or tank catalogue means. For water supply, a source yield of 5 litres per second is 0.432 MLD (million litres per day). The water tank calculator sizes the tank itself.
Quick reference table
| Quantity | Value | Equals | Where it is used |
|---|---|---|---|
| Area | 1 ropani | 508.74 m² = 5,476 sq ft | Hill land, Kathmandu valley |
| Area | 1 aana | 31.80 m² = 342.25 sq ft | House plots |
| Area | 1 kattha | 338.63 m² = 3,645 sq ft | Terai land |
| Area | 1 dhur | 16.93 m² = 182.25 sq ft | Terai land |
| Length | 12 haat | 5.486 m = 18 ft | Traditional measurement |
| Mass | 10 tola | 116.64 g | Gold and silver |
| Mass | 1 quintal | 100 kg | Steel and grain |
| Pressure | 1 MPa | 10.197 kg/cm² | Concrete and steel strength |
| Flow | 1 cumec | 1,000 litres per second | Hydropower and irrigation |
Common mistakes
- Using the length factor for area or volume. 1 m = 3.281 ft, but 1 m² = 10.764 sq ft and 1 m³ = 35.315 cft. Converting a room area with 3.281 gives a figure about 70% too small.
- Mixing kg and kN. Kilogram is mass, kilonewton is force. Use the Force group (kgf) when a load is given in "kg" on old drawings.
- Assuming land units are the same everywhere. Ropani-aana is used in the hills and the valley; bigha-kattha-dhur in the Terai. For land, the Jagga Napi converter gives the full breakdown, and the area written on the land ownership certificate (lalpurja) is the official record.
- Too many decimals. A converter gives six decimal places; an estimate needs two. Round at the end, not at every step.
- UK vs US gallon. The US gallon is about 17% smaller. Most Indian and Nepali catalogues mean litres, so convert to litres when in doubt.
Frequently asked questions
How many square feet are in 1 aana?
342.25 sq ft, which is 31.80 m². Sixteen aana make one ropani.
How do I convert t/m² to kN/m²?
Multiply by 9.807. So 10 t/m² is about 98 kN/m².
Is 1 cft of sand the same as 1 cft of concrete?
Yes as a volume. But dry materials bulk, so the cft of sand and aggregate you buy is more than the cft of finished concrete. The concrete calculator allows for this.
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