Smart AI calculators for fast, accurate results
Finance, measurement conversion, cooking, health, maths and home projects — every tool on its own page, with instant results.
Measurement & unit converters
Length, mass, volume, area, force, energy and more — each on its own page.
Currency Converter (Live Rates)
Convert every world currency with live exchange rates that update automatically.
Length & Height Converter
Convert height, distance and length between metric and imperial units.
Mass & Weight Converter
Switch between grams, kilograms, pounds, ounces, tons and more.
Volume Converter
Liters, milliliters, gallons, cups, pints and cubic units.
Area Converter
Square meters, square feet, acres, hectares and more.
Force Converter
Newtons, kilonewtons, pound-force, dyne and kilogram-force.
Energy Converter
Joules, calories, kilowatt-hours, BTU and electronvolts.
Speed Converter
km/h, mph, m/s, knots and feet per second.
Pressure Converter
Pascal, bar, psi, atmosphere and millimeters of mercury.
Power Converter
Watts, kilowatts, horsepower and BTU per hour.
Time Converter
Seconds, minutes, hours, days, weeks and years.
Digital Storage Converter
Bytes, kilobytes, megabytes, gigabytes and terabytes.
Angle Converter
Degrees, radians, gradians and turns.
Fuel Economy Converter
Kilometers per liter, MPG (US) and MPG (UK).
Cooking calculators
Recipe Scaler
Rescale any ingredient quantity for a different number of servings.
Cups to Grams Converter
Convert cup measurements to grams and ounces per ingredient.
Oven Temperature Converter
Celsius, Fahrenheit, fan setting and UK gas mark.
Health calculators
BMI Calculator
Body Mass Index from your height and weight, with category.
BMR & Calorie Needs Calculator
Daily calories to maintain, lose or gain weight (Mifflin-St Jeor).
Body Fat Calculator
Estimate body fat percentage using the US Navy method.
Ideal Weight Calculator
Healthy weight targets from the Devine and Hamwi formulas.
Daily Water Intake Calculator
How much water to drink based on weight and exercise.
Calories Burned Calculator
Energy burned during an activity using MET values.
Heart Rate Zone Calculator
Training zones based on your maximum heart rate.
Pregnancy Due Date Calculator
Estimated due date from the first day of your last period.
Maths calculators
Percentage Calculator
Find percentages of numbers and percentage change.
Ratio Calculator
Simplify ratios and solve for the missing value.
GCD & LCM Calculator
Greatest common divisor and least common multiple.
Quadratic Equation Solver
Solve ax² + bx + c = 0 including complex roots.
Circle Calculator
Area, circumference and diameter from a radius.
Right Triangle Calculator
Hypotenuse, area and angles from two sides.
Home & Garden calculators
Paint Calculator
Litres of paint needed for walls, coats included.
Concrete Calculator
Concrete volume and bags for a slab or footing.
Tile Calculator
Number of tiles required including wastage.
Wallpaper Calculator
Rolls needed for a room with standard 10 m rolls.
Electricity Cost Calculator
Running cost of any appliance per day, month and year.
Misc calculators
Age Calculator
Exact age in years, months and days from your birth date.
Date Difference Calculator
Days, weeks and months between two dates.
Work Hours & Pay Calculator
Total hours worked including overtime and pay due.
About SmartAiCalc
SmartAICalc provides intelligent, AI-powered calculators designed to deliver fast, accurate results for everyday and professional needs. Our mission is to simplify complex calculations with smart, user-friendly tools you can rely on anytime.