Calculate Anything, Instantly
Percentages, tips, discounts, BMI, loans, age, and date differences — all in your browser, all private.
Percentages, tips, discounts, BMI, loans, age, and date differences — all in your browser, all private.
Calc is a free collection of everyday calculators — percentage, tip, discount, BMI, loan payment, age, and date difference — that all run instantly in your browser. Type a number and the answer updates live, with no submit buttons and no page reloads.
These are the calculations people reach for most: splitting a restaurant bill, working out a sale price, checking a healthy weight range, estimating a loan payment, or counting days until a deadline. Because everything runs locally, your numbers never leave your device and the tool keeps working offline after the page loads.
Percentage Calculator — Calculate percentages, find what percent one number is of another, or determine the original value before a percentage change. Essential for grades, tax calculations, profit margins, and statistical analysis.
Tip Calculator — Split restaurant bills fairly and calculate tips at different percentages. Supports custom split numbers and shows per-person amounts. Great for group dining, delivery orders, or service industry workers.
Discount Calculator — See the final price after applying percentage discounts, calculate how much you're saving, and compare original vs discounted prices. Perfect for shopping sales, negotiating prices, or understanding promotions.
BMI Calculator — Calculate your Body Mass Index using the standard weight/height² formula. Supports both metric (kg/cm) and imperial (lbs/in) units. Note: BMI is a screening tool, not a diagnostic — consult a healthcare professional for personalized advice.
Loan Calculator — Estimate monthly payments, total interest, and total cost using the standard amortization formula. Input loan amount, interest rate, and term to see a complete payment breakdown. Useful for mortgages, auto loans, and personal loans.
Age Calculator — Calculate exact age in years, months, and days between two dates. Useful for age verification, birthday planning, or determining eligibility for age-restricted services.
Date Difference Calculator — Calculate the exact number of days between any two dates. Perfect for project timelines, countdowns, contract durations, or measuring time between events.
Calc includes seven everyday calculators: percentage, tip, discount, BMI, loan payment, age, and date difference. Each one updates instantly as you type, so there is no submit button to press.
Yes. The tools use standard formulas: the loan calculator uses the standard amortization formula, BMI uses the standard weight/height² formula, and the date calculator counts exact calendar days. All math runs locally in your browser.
Completely. Every calculation happens in your browser with JavaScript. Your numbers are never sent to a server, stored, or logged, and there are no accounts to sign up for.
Yes. Calc works on any device with a browser — desktop, tablet, or phone. The interface is responsive and the service worker lets the tool keep working offline after the page has loaded.
Enter the loan amount, annual interest rate, and term in years. The calculator returns your fixed monthly payment, total interest paid over the loan's life, and the total amount repaid, using the standard amortization formula.
BMI (Body Mass Index) is a screening tool that uses weight and height to estimate body fat. Under 18.5 is underweight, 18.5-24.9 is normal weight, 25-29.9 is overweight, and 30+ is obese. Note: BMI doesn't account for muscle mass, bone density, or body composition — athletes may have high BMI but low body fat.
The loan calculator uses the standard amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1], where M is the monthly payment, P is the principal (loan amount), r is the monthly interest rate, and n is the number of months. This gives you fixed monthly payments over the loan term.
Yes! The tip calculator lets you set the number of people splitting the bill. Enter the bill amount, select your tip percentage, and set the number of people. The calculator shows the tip per person and total per person, making group dining easy to split.
Select any two dates and the date difference calculator shows the exact number of days between them. This accounts for leap years and different month lengths. It's useful for project timelines, contract durations, countdowns, or measuring time between events.
Yes! Calc works completely offline once the page has loaded. All calculations happen locally in your browser with JavaScript. You don't need an internet connection to use any of the calculators, making it perfect for use while traveling or in areas with limited connectivity.
Yes. The calculators use standard mathematical formulas: amortization for loans, weight/height² for BMI, and exact calendar math for date differences. The results match what you'd get from professional financial calculators or medical tools. For financial decisions, consult a professional advisor.
The tip calculator supports multiple currencies including USD, EUR, GBP, JPY, CAD, AUD, and more. Select your currency from the dropdown to see formatted amounts with the correct symbol and decimal places.