Free Calculators for Users in India
India uses the metric system for official and scientific purposes, but everyday life involves a mixture of traditional Indian units, metric measurements and occasional encounters with imperial units through British-era conventions, international business and imported goods.
This guide covers the conversions and calculation tools most relevant for users in India, from everyday health and cooking to professional and financial planning. All tools are free at CalConvs.com.
Traditional Indian Units and Metric Equivalents
Certain traditional units remain in everyday use across different regions of India, particularly for land measurement and food quantities.
| Indian Unit | Metric Equivalent | Notes |
|---|---|---|
| 1 bigha (commonly used) | Approximately 1,337 m² in UP | Varies by state: 843 m² to 3,025 m² |
| 1 gaj (yard) | 0.914 metres | Used for fabric and carpet measurement |
| 1 tola | 11.664 grams | Traditional gold and silver measurement |
| 1 maund | 37.32 kg | Traditional grain and commodity measure |
| 1 seer | 0.933 kg | Smaller traditional weight unit |
| 1 kattha | Around 125 to 135 m² in Bihar | Varies by region, used for land |
Gold and Silver: Tola and Gram
Gold prices in India are frequently quoted per 10 grams and sometimes per tola. One tola is 11.664 grams. Jewellers and commodity exchanges use both units.
Gold Unit Reference
1 tola = 11.664 grams
10 grams = 0.857 tola
1 troy ounce (international gold standard) = 31.1 grams = 2.67 tola
Example: Gold price of 6,000 rupees per gram
Price per tola = 6,000 × 11.664 = 69,984 rupees per tola
Price per 10 grams = 6,000 × 10 = 60,000 rupees per 10 grams
Use the Weight and Mass Converter for gram, kilogram and troy ounce conversions.
Land Measurement in India
Land in India is measured using both metric units (square metres, hectares) and traditional units that vary by state. The following metric equivalents are most useful for property transactions involving buyers from different regions or overseas.
| Unit | Metric Equivalent |
|---|---|
| 1 acre | 4,046.86 m² or 0.405 hectares |
| 1 hectare | 10,000 m² or 2.471 acres |
| 1 square foot | 0.0929 m² |
| 1 square yard (sq gaj) | 0.836 m² |
| 100 square yards | 83.6 m² |
| 1,000 square feet | 92.9 m² |
| 1 bigha (Bihar and UP standard) | Approximately 1,337 m² |
Use the Area Converter for square metres, acres, hectares and square feet conversions.
Health and Wellness in India
India uses kilograms and centimetres for official health measurements. All clinical measurements follow the metric standard. The CalConvs health tools work natively in metric units for Indian users.
Asia-Pacific BMI Classifications Used by Some Indian Health Authorities
Standard WHO BMI classifications are widely used in India. Some research suggests South Asian adults face higher health risks at lower BMI thresholds than Western populations.
Underweight: below 18.5 Normal: 18.5 to 22.9
Overweight: 23 to 24.9 Obese Class 1: 25 to 29.9 Obese Class 2: 30 and above
Discuss with your doctor which BMI classification applies to your health assessment.
- BMI Calculator: uses WHO standard classifications
- Calorie Calculator: daily calorie needs in kilocalories, consistent with Indian dietary guidelines
- Ideal Weight Calculator: healthy weight range based on height, in kilograms
Mathematics Tools for Indian Students
Indian students from Class 6 to Class 12 and competitive exam preparation (JEE, NEET, CAT, UPSC) use a wide range of mathematical tools.
- Scientific Calculator: essential for physics, chemistry and engineering entrance exams including JEE and NEET
- Standard Deviation Calculator: statistics for Class 11 and 12 maths and competitive exam preparation
- Quadratic Formula Calculator: Class 10 algebra and beyond
- Fraction Calculator: useful from Class 5 through to competitive exam preparation
- Ratio Calculator: ratios and proportion, a common topic in aptitude tests including CAT and UPSC
- Percentage Calculator: percentage calculations appear in every competitive exam
Related Tools for Users in India
- Weight and Mass Converter: kilograms, grams and international units
- Area Converter: square metres, acres and hectares for land measurement
- Temperature Converter: Celsius and Fahrenheit
- All Unit Converters: browse all converters on CalConvs
Frequently Asked Questions
How do I convert bigha to square metres?
The bigha varies significantly by state in India. In Uttar Pradesh and Bihar it is approximately 1,337 square metres, while in some other states it ranges from 843 to 3,025 square metres. Always confirm the local bigha standard before any property transaction. For the internationally recognised units, use the Area Converter to switch between square metres, hectares, acres and square feet.
What is the difference between a tola and a gram in gold pricing?
A tola is a traditional Indian and South Asian unit of weight equal to 11.664 grams. When gold is priced in India, you will see prices quoted per 10 grams, per tola and per kg. International gold prices are quoted in troy ounces (31.1 grams). To convert any gold weight unit to another, use the Weight and Mass Converter.
Which calculator is best for JEE preparation?
The Scientific Calculator on CalConvs covers trigonometric functions, logarithms, exponentials and standard arithmetic, all required for JEE Physics, Chemistry and Mathematics. For statistics topics in competitive maths, the Standard Deviation Calculator and Statistics Calculator are also useful. Remember that JEE and NEET exams are pen-and-paper tests and do not permit calculators in the exam hall.
Are Indian BMI standards different from international standards?
The standard WHO BMI classification (underweight below 18.5, normal 18.5 to 24.9, overweight 25 to 29.9) is widely used in India. However, some Indian health authorities and researchers recommend lower thresholds for defining overweight and obesity in South Asian populations due to evidence that metabolic complications appear at lower BMI levels in these groups. Always discuss BMI results with a healthcare professional for personalised interpretation.