Calculators
Every tool, in one place.
301 live. Pick a category below or use ⌘K from anywhere on the site.
Finance
Loans, savings, investments, and money tools.
Multi-Loan Payoff Strategy Simulator
Simulate paying off multiple student loans or credit cards. See exactly how much time and interest you save using the Avalanche vs Snowball methods.
Amortization Schedule Calculator
Generate a complete amortization schedule for your loan.
Reverse Mortgage Calculator
Estimate payouts from a reverse mortgage.
Cap Rate Calculator
Calculate the capitalization rate of a real estate investment.
Return on Equity (ROE) Calculator
Calculate the return on equity for your business or investments.
Customer Acquisition Cost Calculator
Calculate your CAC (Customer Acquisition Cost).
Health
BMI, calories, fitness, and wellness calculators.
Body Surface Area (BSA) Calculator
Calculate your body surface area using the Mosteller and Du Bois formulas.
GFR Calculator (eGFR)
Estimate glomerular filtration rate (eGFR) to assess kidney function.
A1C Calculator
Convert A1C to estimated average blood glucose (eAG) and back.
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio — a simple indicator of health risk.
Intermittent Fasting Calculator
Plan your fasting and eating windows for 16:8, 18:6, OMAD and more.
Weight Loss Calculator
Find the daily calories and time needed to reach your goal weight.
Education
GPA, grades, attendance, and academic tools.
Interactive Grading Curve Analyzer
Teachers and professors: Paste your student test scores to instantly calculate the mean, median, and apply various grading curves (Square Root, Flat Bump, etc).
Target GPA Predictor
Calculate exactly what grades you need in your remaining classes to reach your target GPA. See if Cum Laude or honors is mathematically possible.
GPA Calculator
Calculate semester and cumulative GPA across multiple grading systems.
Attendance Calculator
Track attendance percentage and calculate classes needed to meet requirements.
CGPA to Percentage Calculator
Convert CGPA to percentage and vice-versa for major university grading systems.
Percentage Marks Calculator
Calculate your percentage from marks obtained and total marks instantly.
General
Age, percentage, ratios, and everyday math.
Advanced HVAC & AC BTU Estimator
Calculate the exact AC BTUs and Tonnage required to cool or heat a room based on square footage, sun exposure, occupancy, and insulation.
Comprehensive Event Alcohol & Catering Estimator
Calculate exactly how much beer, wine, liquor, and ice you need to buy for your wedding or party so you don't run out.
Speed, Distance, Time Calculator
Solve for speed, distance or time given the other two values.
Unit Price Calculator
Compare products by price per unit to find the best value.
Age Calculator
Calculate your exact age in years, months, weeks, days, hours and minutes.
Percentage Calculator
Calculate percentages, increases, decreases, and percentage differences.
Conversion
Length, weight, temperature, and unit converters.
Unit Converter
Convert between length, weight, area, volume, temperature, speed, time and data.
Cooking Measurement Converter
Convert cooking measurements between cups, ml, tablespoons, grams, and more.
Clothing Size Converter
Convert clothing sizes between US, UK, EU, AU, and international systems.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, CM, and JP for men, women, and kids.
Color Code Converter
Convert colors between HEX, RGB, HSL, and HSV with live preview.
Binary / Hex Converter
Convert between binary, decimal, hexadecimal, and octal number systems.
Utility
Time, dates, and other day-to-day helpers.
Date Difference Calculator
Calculate the gap between two dates in years, months, days, weeks, hours, and business days.
Time Zone Converter
Convert any time across 25+ major cities worldwide — DST and offsets handled automatically.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly.
Fuel Cost Calculator
Calculate fuel cost for a trip based on distance, mileage, and fuel price.
Time Calculator
Add, subtract, and convert between hours, minutes, and seconds easily.
Business Days Calculator
Count business days (weekdays) between two dates, excluding weekends.
Math & Stats
Geometry, algebra, statistics, and complex math.
Prime Number Calculator
Check if a number is prime and find its prime factorization.
Exponent Calculator
Raise any base to any power, including negative and fractional exponents.
Square Root Calculator
Find the square root, cube root and nth root of any number.
Logarithm Calculator
Compute log base 10, natural log, and logarithms of any base.
Factorial Calculator
Calculate the factorial (n!) of any non-negative integer.
Permutation and Combination Calculator
Calculate permutations (nPr) and combinations (nCr) quickly.
Technology
Networking, hashing, base64, and dev tools.
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB and binary units.
Bandwidth Calculator
Calculate data transfer time, bandwidth, and hosting requirements.
Download Time Calculator
Estimate how long a file takes to download at a given internet speed.
PPI Calculator (Pixels Per Inch)
Calculate a screen’s pixels per inch from resolution and diagonal size.
Mouse DPI Calculator
Calculate effective DPI (eDPI) and cm/360 for gaming mouse sensitivity.
Video Bitrate Calculator
Calculate video bitrate, file size, or duration for any recording.
All Calculators A–Z
Every tool on OurDailyCalc, linked for easy access.
Calculator Guides & Articles
In-depth guides for every calculator.
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