TopToolAICalculators
General-purpose calculators for money, health and maths. The quick everyday ones (BMI, age, percentage, tip, loan EMI) sit alongside the maths tools: fractions, LCM and GCD, ratios, quadratic equations, prime numbers, standard deviation, permutations and more. The maths ones show the working as well as the answer, so they are handy for homework and for checking your own steps.
Looking for something country-specific, like income tax or VAT? Those are grouped under the Pakistan, India, USA, UAE, Australia and China tools instead.
49 tools in this category
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Waist-to-Hip Ratio Calculator
Calculators
Waist-to-hip ratio calculator: enter your waist and hip to see your ratio and how it compares with the WHO limits for men and women.
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BMR Calculator
Calculators
Free BMR calculator for men and women: find your basal metabolic rate with the Mifflin-St Jeor equation and your daily calories by activity level.
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Healthy Weight for Height Calculator
Calculators
Healthy weight for height calculator: find the healthy weight range in kg and lb for your height, based on a BMI of 18.5 to 24.9.
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BMI Calculator for Asians
Calculators
BMI calculator for Asians: check your BMI against the WHO Asian action points (23 and 27.5) and the international categories. For Pakistan, India and South Asia.
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BMI Calculator for Kids and Teens
Calculators
Free BMI calculator for kids and teens (ages 2 to 19): get your child's BMI percentile and weight category from the CDC growth charts for boys and girls.
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BMI Calculator for Women
Calculators
Free BMI calculator for women: enter your weight and height to see your BMI, your category and the healthy weight range for your height.
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BMI Calculator for Men
Calculators
Free BMI calculator for men: enter your weight and height to see your BMI, your category and the healthy weight range for your height.
Running Pace & Speed Converter
Calculators
Running Pace & Speed Converter, a free, instant tool.
Twitter/X Character Counter
Calculators
Twitter/X Character Counter, a free, instant tool.
Instagram Engagement Rate Calculator
Calculators
Instagram Engagement Rate Calculator, a free, instant tool.
Electricity Bill Calculator
Calculators
Estimate your monthly electricity bill from units consumed and your per-unit tariff rate.
Scientific Notation Converter
Calculators
Scientific Notation Converter, a free, instant tool.
Pythagorean Theorem Calculator
Calculators
Pythagorean Theorem Calculator, a free, instant tool.
Permutation & Combination Calculator
Calculators
Permutation & Combination Calculator, a free, instant tool.
Standard Deviation Calculator
Calculators
Standard Deviation Calculator, a free, instant tool.
Simplify Fractions Calculator
Calculators
Simplify Fractions Calculator, a free, instant tool.
Aspect Ratio Calculator
Calculators
Calculate the correct width or height to keep any image or video ratio.
Solar Calculator
Calculators
Estimate solar panel output and potential electricity bill savings.
Time Duration Calculator
Calculators
Add or subtract hours, minutes and seconds between two times.
Average Calculator
Calculators
Find the average (mean) of any list of numbers instantly.
Age Difference Calculator
Calculators
Find the exact age gap between two people in years, months and days.
Days Between Dates Calculator
Calculators
Find the exact number of days, weeks or months between any two dates.
Basic Calculator
Calculators
Simple everyday calculator for quick addition, subtraction, multiplication and division.
Calorie Calculator
Calculators
Daily calorie needs based on age, weight, height and activity.
Body Fat Calculator
Calculators
Estimate body fat percentage using standard formulas.
Fuel Cost Calculator
Calculators
Estimate trip fuel cost from distance, mileage and fuel price.
Discount Calculator
Calculators
Work out the final price after any percentage discount.
Percentage Calculator
Calculators
Quick percentage, increase and decrease calculations.
Unit Converter
Calculators
Convert length, weight, volume and temperature units worldwide.
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GPA Calculator
Calculators
Calculate your GPA on the standard 4.0 international scale.
VAT / GST Calculator
Calculators
Add or remove VAT/GST at any custom rate, for any country.
Gas Bill Calculator
Calculators
Estimate your monthly gas bill from meter units used.
Currency Converter
Calculators
Convert between major world currencies using live rates.
Loan EMI Calculator
Calculators
Monthly installment and amortization schedule for any loan.
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