Unit Conversion Chart and Calculator for India

Unit Conversion Chart: Your Quick Reference

A conversion chart is a table that lists the most used values side by side. You look up a number instead of working it out. This page gives you charts for length, weight, area and temperature, built for Indian use, and then shows how to use a calculator when your number is not in the chart.

All factors below follow the metric system used in India under the Legal Metrology framework published by the Department of Consumer Affairs. Values are rounded to a few decimals for easy reading.

Length Chart: Kilometres, Miles, Feet and Centimetres

Kilometres	Miles	Metres
1	0.62	1,000
2	1.24	2,000
5	3.11	5,000
10	6.21	10,000
50	31.07	50,000
100	62.14	1,00,000

For short lengths, remember that 1 inch is 2.54 cm and 1 foot is 30.48 cm. So 5 feet 6 inches is 66 inches, which is 167.64 cm.

Weight Chart: Kilograms, Pounds and Quintals

Kilograms	Pounds	Quintals
1	2.20	0.01
5	11.02	0.05
10	22.05	0.10
25	55.12	0.25
50	110.23	0.50
100	220.46	1.00

One tonne is 1,000 kg or 10 quintal. One tola is 11.664 g, so 10 tola is 116.64 g.

Area Chart: Land Units Used in India

Unit	Square feet	Square metres
1 sq m	10.764	1
1 gaj (sq yd)	9	0.836
1 cent	435.6	40.47
1 guntha	1,089	101.17
1 acre	43,560	4,046.86
1 hectare	1,07,639	10,000

Useful links within the chart: 1 acre equals 100 cents and 40 guntha. 1 hectare equals about 2.471 acres. Units like bigha and kanal are not in this chart because their size changes by state.

Temperature Chart: Celsius and Fahrenheit

Celsius	Fahrenheit	What it feels like
0	32	Freezing point of water
10	50	Cold winter morning in the north
25	77	Pleasant room temperature
37	98.6	Normal body temperature
40	104	Summer heat wave day
100	212	Boiling point of water

Key takeaway: A chart is perfect for common values, but a calculator is better for exact numbers. Use the chart to check that the calculator result is in the right range.

When to Use a Calculator Instead of a Chart

Charts only list round numbers. Real life gives you odd values such as 137 km, 63.5 kg or 1,375 sq ft. For these, use a unit conversion calculator. You type the number, choose the units and get the exact result with no table lookup.

A good habit is to use both. Glance at the chart to know the rough answer, then use the calculator for the exact one. If they disagree by a lot, you have likely picked the wrong unit.

Worked Example 1: Highway Distance Using the Chart

You plan a drive of 137 km. From the chart, 100 km is 62.14 miles and 10 km is 6.21 miles. So 137 km is about 62.14 + (3 x 6.21) + (7 x 0.62) = 62.14 + 18.63 + 4.34 = 85.11 miles. The exact figure is 137 / 1.609344 = 85.13 miles. The chart method is within 0.02 miles, which is more than enough for planning.

Worked Example 2: Buying Grain by Weight

A mill owner in Indore buys 63.5 quintal of soybean. In kilograms that is 63.5 x 100 = 6,350 kg. In tonnes it is 6.35. If the assumed price is Rs 4,500 per quintal, the cost is 63.5 x 4,500 = Rs 2,85,750. A weight chart would show only round values like 50 and 100, but with the factor of 100 you can handle any weight quickly.

Worked Example 3: Flat Area for a Home Loan Form

A bank form asks for the carpet area in square metres, but your builder agreement says 1,375 sq ft. Convert: 1,375 / 10.7639 = 127.74 sq m. If the builder price is Rs 6,200 per sq ft, the total is 1,375 x 6,200 = Rs 85,25,000. Having the area in both units makes it easy to fill the form and check the builder rate.

Volume and Fuel Chart

Litres	US gallons	Millilitres
1	0.26	1,000
5	1.32	5,000
20	5.28	20,000
35	9.25	35,000
100	26.42	1,00,000

To use this chart, remember that 1 US gallon is 3.78541 litres. A 35-litre car tank therefore holds about 9.25 US gallons. The litre chart is also handy for water tanks, where 1,000 litres equals 1 cubic metre.

Worked Example 4: Phone and TV Screen Sizes

Screen sizes are given in inches, but many Indian shoppers think in centimetres. A 6.7-inch phone has a diagonal of 6.7 x 2.54 = 17.02 cm. A 43-inch TV has a diagonal of 43 x 2.54 = 109.22 cm. A 65-inch TV has a diagonal of 165.1 cm and a width of about 144 cm. If your wall space is 4 feet wide, which is 121.92 cm, the 65-inch TV will not fit in that gap. Looking at sizes in centimetres helps you decide before you pay Rs 60,000 or more for a big screen.

Remember that screen size is a diagonal, not a width, so always check the product page for the actual width and height in the specification list.

How to Make Your Own Quick Chart

You do not need a printed book to build a chart. Open a notes app or a spreadsheet and follow three steps. First, list the five or six values you convert most, such as 1, 5, 10, 50 and 100. Second, write the exact factor for your pair at the top, for example 1 kg = 2.20462 lb. Third, multiply each value by the factor and write the answers in the next column, rounded to two decimals.

For example, a small trader in Ludhiana who ships garments in kilograms to a buyer who uses pounds can make a table for 5, 10, 25 and 50 kg. When a customer calls with an order of 25 kg, the answer of 55.12 lb is ready in a second. The same trader can add a rupee column, for instance Rs 180 per kg, to show that 25 kg costs Rs 4,500. A personal chart like this saves time, avoids repeated typing and keeps your numbers consistent across invoices and messages.

Update the chart if your needs change. A farmer might switch to quintal and acre columns, and a student might add a Celsius and Kelvin column for science practice.

Benefits of Using Charts and Calculators Together

Charts give instant feedback with no typing, which is helpful when you are on a shop floor or a farm without a good phone signal. Calculators remove human error for odd numbers and give you results with many digits. Using both gives you a built-in double check, which matters when money or safety is involved. They also help you learn: a person who reads the chart often starts to remember the common values, such as 1 mile being 1.61 km. Finally, both are free, so small shops, students and farmers can use them with no cost.

Challenges and Limitations

Charts are limited in range. If your value is not listed, you must work it out, which brings room for mistakes. Rounded values can add up. If you convert 1 mile as 1.6 km instead of 1.609, you will be off by 5 metres over a mile, and by half a kilometre over 100 miles. Another limit is regional units, which no single chart can cover for the whole country. Calculators avoid some of these limits, but they cannot guess which unit you meant, so you still have to select carefully.

Common Mistakes When Reading Charts

• Reading the wrong column. Place a finger or ruler on the row and read across carefully.
• Using a rounded value for big numbers. Use 1.609344, not 1.6, for long distances.
• Mixing area units. Do not use a metre chart for square metres.
• Forgetting the temperature offset. Fahrenheit has a 32 shift, so you cannot just multiply.
• Assuming a chart is the final answer. For legal papers, use exact calculator values.
• Using an old chart. Make sure it uses current metric factors and not old local seer or maund values.

Best Practices and Expert Recommendations

• Print or save the chart. Keep a screenshot on your phone for offline use.
• Add your own rows. If you often convert 1,200 sq ft, add that row to your own notes.
• Use exact factors for money. Land, gold and goods worth lakhs deserve exact conversions.
• Cross-check with a second tool. For plots, compare the main calculator with an area converter.
• Write the date and source. This is useful when you share numbers with a buyer or a bank.
• Round only at the end. Do the full calculation first, then round to the needed digits.

Try It Yourself

Open the DigiToolkit unit converter, enter a value not listed in the charts, such as 63.5 quintal or 1,375 sq ft, and compare the result with what you estimate from the table. It takes seconds and builds your feel for the numbers.

Conclusion

Charts give you fast answers for common values, and a calculator gives exact results for any value. Together they cover length, weight, area and temperature for everyday Indian needs. Save the tables above, learn the key links, and use the free tool whenever you need an exact number.

FAQs

Where can I find a unit conversion chart for India?
You can use the charts on this page, which cover length, weight, area and temperature with Indian units like quintal, gaj and acre. For exact values outside the chart, use an online unit converter.

How many square feet are in one acre?
One acre equals 43,560 square feet. It also equals 100 cents or 40 guntha, and about 4,046.86 square metres.

How many pounds are in 50 kg?
Multiply 50 by 2.20462 to get about 110.23 pounds. A quick mental check is to double the kilograms and add 10 percent.

Is a chart or a calculator better?
A chart is quick for common values and useful offline. A calculator is better for exact or unusual numbers. Using both gives you a helpful double check.

What is 40 degrees Celsius in Fahrenheit?
Forty degrees Celsius equals 104 degrees Fahrenheit. The formula is Celsius x 9/5 + 32.