Calculators — All 41 Free Online Tools
Every calculators tool on Toolfyra in one place — 41 free tools that run entirely in your browser. No signup, no uploads, no watermarks: open a tool, use it, close it — your data never leaves your device.
Age Calculator
Free age calculator: find your exact age in years, months and days from your date of birth — plus total days,
％Percentage Calculator
Free percentage calculator: what is X% of Y, X is what percent of Y, and percentage increase or decrease. Inst
🏦EMI / Loan Calculator
Free EMI calculator: compute monthly loan payments, total interest and total repayment for home, car or person
⚖️BMI Calculator
Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy weight category instan
🎓CGPA / Percentage Converter
Free CGPA to percentage calculator: convert CGPA↔percentage using the CBSE (×9.5) and HEC-style (÷4) formulas.
📏Land Area Converter
Free land area converter: convert between Marla, Kanal, Acre, Hectare, Square Feet, Square Yards and Square Me
📆Date Difference Calculator
Free date difference calculator: days, weeks, months and working days between two dates. Great for deadlines,
🧁Cooking Unit Converter
Free cooking converter: cups, tablespoons, teaspoons, fluid ounces, milliliters and grams (by ingredient densi
🏷️Unit Price Comparator
Free unit price comparator: compare two pack sizes and prices — which is actually cheaper per 100g/oz/unit, in
🐕Pet Cost Calculator
Free pet cost calculator: food, vet, insurance, grooming and boarding for dogs and cats — the honest first-yea
⛽Fuel Cost Calculator
Free fuel cost calculator: trip distance × efficiency × fuel price — split between passengers, one-way or retu
🎓Grade Calculator
Free grade calculator: points or percentage in — letter grade, GPA point and pass/fail out, with grading-scale
📝Final Exam Grade Calculator
Free final grade calculator: current grade, exam weight and target — the exact score you need on the final, wi
📅Business Days Calculator
Free business days calculator: count working days between two dates (weekends excluded) or add N business days
🔢Number to Words Converter
Convert any number to English words instantly: 1,250,000 → one million two hundred fifty thousand. Internation
🧮Online Calculator
Free online calculator for everyday math: add, subtract, multiply, divide, percent, square root, sign and memo
📏Length Converter
Free length converter: convert meters, feet, inches, cm, km, miles, yards and mm instantly. Accurate to 6 deci
⚖️Weight Converter
Free weight converter: kg to pounds, ounces to grams, stones to kg and more — exact factors, instant results,
🌡️Temperature Converter
Free temperature converter: C to F, F to C, Kelvin and Rankine — exact formulas, instant results, works offlin
🏎️Speed Converter
Free speed converter: km/h to mph, knots, meters per second, feet per second and Mach — instant, offline, exac
🗺️Area Converter
Free area converter: sq m, sq ft, acres, hectares, sq miles, sq km, bigha-style conversions — instant and exac
🧪Volume Converter
Free volume converter: liters, gallons, ml, cups, fluid ounces, tablespoons, cubic meters — instant, exact, of
🎈Pressure Converter
Free pressure converter: PSI to bar, kPa, atmospheres, mmHg/Torr, mbar — exact factors, instant, offline.
🍳Cooking Measurement Converter
Free cooking converter: cups to grams and ml, tablespoons, teaspoons, fluid ounces — US and metric, recipe-saf
👟Shoe Size Converter
Free shoe size converter: US to UK, EU and centimeters for men, women and kids — instant, offline, shopping-sa
🎲Random Number Generator
Free random number generator: any range, optional decimals, unique-only mode, bulk generate — instant and priv
🎲Online Dice Roller
Free dice roller: roll any dice notation (2d20+5, 4d6) with crypto-fair randomness — tabletop RPGs and board g
🪙Coin Flip Online
Free coin flipper: flip 1–1000 coins, see heads/tails counts and percentages — crypto-fair, instant, offline.
🤷Yes or No Picker
Can't decide? Free yes/no picker: cryptographically fair random answers — big result, flip history, instant.
⏲️Online Countdown Timer
Free countdown timer: set minutes and seconds, big display, beep alarm at zero — workouts, cooking, exams.
⏱️Online Stopwatch
Free online stopwatch: start/stop/lap/reset with millisecond precision and a lap table — workouts, cooking, ti
🔢Lucky Number Calculator
Calculate your lucky number free from your date of birth using the standard numerology method (digit reduction
♈Zodiac Sign Finder (Star Sign)
Find your star sign from your date of birth: exact date ranges, element, ruling planet, symbol and traditional
📈Biorhythm Calculator
Calculate your biorhythm cycles free: the 23-day physical, 28-day emotional and 33-day intellectual curves fro
🎨Lucky Color Finder (By Birth Date)
Find your lucky colour free from your birth date and day of the week, using the traditional numerology colour
🐾Pet Age Converter (Dog & Cat Years)
Convert dog and cat age to human years free using the size-aware formula, not the old ×7 myth. Enter the pet's
🥣Pet Food Calculator (Daily Portions)
Work out your pet's daily food amount free: resting and maintenance energy needs from weight, age and body con
🎯GPA Goal Calculator
Enter current GPA, credits earned and credits left, and see the exact average GPA you must earn in remaining t
💱Currency Converter
Convert currency online free with live daily exchange rates for 160+ world currencies — USD, EUR, GBP, PKR, IN
🏛️Roman Numeral Converter
Convert numbers to Roman numerals and back free: 1–3999 both directions with validation and a quick reference
🍅Pomodoro Timer
Free Pomodoro timer: 25-minute focus, 5-minute break, long break after 4 rounds, with audio chimes and session
📖 Popular guides
- Age Calculator — how to use
- Age Calculator — mistakes
- Age Calculator — faq
- Percentage Calculator — how to use
- Percentage Calculator — mistakes
- Percentage Calculator — faq
- EMI / Loan Calculator — how to use
- EMI / Loan Calculator — mistakes
- EMI / Loan Calculator — faq
- BMI Calculator — how to use
- BMI Calculator — mistakes
- BMI Calculator — faq
- CGPA / Percentage Converter — how to use
- CGPA / Percentage Converter — mistakes
- CGPA / Percentage Converter — faq
- Land Area Converter — how to use
- Land Area Converter — mistakes
- Land Area Converter — faq