200+ free online calculators — fast, accurate, no sign-up
Free mortgage calculator: estimate monthly payments, total interest, and full amortization schedule. Compare 15-year vs 30-year loans, see PMI and tax impact. Make informed home buying decisions.
Free home affordability calculator: find out how much house you can afford based on income, debts, down payment, and interest rate. Uses the 28/36 DTI rule. Estimate your buying power today.
Calculate your monthly car loan payments, total interest, and see the full amortization schedule
Free loan calculator: calculate monthly payments, total interest, and total cost for personal loans, auto loans, and more. Compare bi-weekly vs monthly payments. No sign-up required.
Free payment calculator: find the optimal loan term or monthly payment for your budget. Calculate how much you need to pay each month to meet your financial goals.
Free compound interest calculator: see how your investments grow over time with daily, monthly, or yearly compounding. Calculate future value, total interest, and plan your retirement savings.
Free tip calculator: calculate the perfect tip amount for any bill percentage. Split the bill among any number of people. Ideal for restaurants, bars, and group dining.
Free health and fitness calculators: calculate your BMI, BMR, TDEE, body fat percentage, and ideal weight all in one place. Track your wellness journey with accurate results.
Free BMR calculator using the Mifflin-St Jeor equation: calculate your basal metabolic rate and daily calorie needs. Understand how age, gender, and weight affect your resting metabolism.
Free TDEE calculator: calculate your Total Daily Energy Expenditure based on BMR and activity level. Get maintenance calories, and estimates for weight loss or muscle gain.
Free body fat calculator: estimate your body fat percentage using US Navy circumference measurements. Track your fitness progress with measurements for men and women.
Free ideal weight calculator: calculate your healthy body weight range based on height and gender using the Devine formula. Find your ideal weight for better health.
Free BMI calculator for men and women: calculate your Body Mass Index instantly. See your WHO health category, healthy weight range, and BMI chart. Supports metric and imperial units.
Free grade calculator: calculate your weighted grade average and track your academic performance. Add multiple assignments with different weights to find your overall course grade.
Free GPA calculator: calculate your Grade Point Average on a 4.0 or 5.0 scale. Track semester and cumulative GPA for high school or college. Supports letter grades and percentages.
Free final exam calculator: calculate what grade you need on your final exam to achieve your target course grade. Works with weighted grading systems. Plan your study strategy.
Free age calculator: find out your exact age in years, months, and days. Calculate how many total days, hours, and minutes you have been alive. Also find days until your next birthday.
Free time calculator: add, subtract, and calculate time durations in hours, minutes, and seconds. Perfect for tracking work hours, cooking times, or any time-based calculations.
Free date calculator: add or subtract days, weeks, or months from any date. Calculate the exact difference between two dates including business days. Perfect for project planning.
Free business days calculator: calculate working days between two dates or add business days to any date. Excludes weekends and holidays. Essential for project planning and contracts.
Free percentage calculator: calculate what percent one number is of another, find percentage increases and decreases, and solve percent problems. Fast and accurate.
Free basic online calculator for everyday arithmetic: addition, subtraction, multiplication, and division. Simple, clean interface for quick calculations.
Free online scientific calculator with trigonometric, logarithmic, exponential, and statistical functions. Perfect for students, engineers, and professionals.
Free time unit converter: convert between milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, and centuries. Fast and accurate time conversion.
Free shoe size converter: convert between US, UK, EU, JP shoe sizes and foot length in centimeters and inches. Perfect for international online shoe shopping.
Free online unit converter: convert between units of length, weight, temperature, area, and volume. Fast and accurate conversions for everyday use, cooking, travel, and work.
Free length converter: convert between meters, feet, inches, centimeters, miles, kilometers, and more. Height converter, distance converter, and metric-imperial conversion.
Free weight converter: convert between kilograms, pounds, ounces, grams, and more. Perfect for cooking, fitness, shipping, and everyday weight conversions.
Free temperature converter: convert between Celsius, Fahrenheit, Kelvin, and more. Oven temperature converter, weather conversion, and scientific temperature conversion.
Free area converter: convert between square meters, acres, hectares, square feet, square miles, and more. Perfect for real estate, land measurement, and construction.
Free volume converter: convert between liters, gallons, cups, milliliters, pints, quarts, and more. Cooking converter, liquid volume conversion, and baking measurements.
Free speed converter: convert between km/h, mph, knots, m/s, and more. Perfect for travel planning, running pace conversion, and wind speed comparison.
Free data storage converter: convert between bytes, KB, MB, GB, TB, PB, and more. Perfect for file size conversion, storage planning, and tech specifications.
Free pressure converter: convert between Pa, kPa, Bar, PSI, atmospheres, and more. Tire pressure converter for automotive and industrial use.
Free password generator: create strong, secure, random passwords with customizable length, uppercase, lowercase, numbers, and symbols. Generate uncrackable passwords instantly.
Free random number generator: generate random numbers within any range. Perfect for lotteries, giveaways, games, statistical sampling, and decision making.
Free discount calculator: calculate savings and final price after any percentage discount. Add sales tax for the final out-the-door price. Perfect for shopping and sales.
Free fuel cost calculator: estimate trip fuel costs based on distance, fuel consumption rate, and current fuel prices. Plan your road trip budget and compare vehicle efficiency.