All Tools
Browse every calculator and utility by category.
Loan Payoff Calculator
Extra payments, months saved, interest saved and full schedule
Hiking Time Calculator
Distance and elevation gain to estimated time (Naismith's rule)
Korea Unemployment Benefit Calculator
Daily benefit, paid days, and total payout (2026 rules)
Loan Calculator
Monthly payment, total interest
Percentage Calculator
Ratios, increase/decrease
Tip Calculator
Tip amount, total, per person
Discount Calculator
Final price & amount saved
Scientific Calculator
Trig, log, sqrt, powers and more
13th Month Pay Calculator (Philippines)
PD 851 13th month pay from basic salary and months worked
SIP Calculator
Monthly mutual fund SIP maturity value and gains
Compound Interest Calculator
Final balance, total interest, contributions
Average Calculator
Mean, median, min, max, sum from a list of numbers
Sales Tax Calculator
Tax amount, total price, and reverse (total to net)
VAT Calculator
Add or remove VAT (Net ↔ Gross) with UK and EU rate presets
Hourly to Salary Calculator
Hourly rate to annual, monthly, weekly and daily pay
Bill Split Calculator (Warikan)
Split a bill evenly with clean rounding, per person
GST/HST Calculator
Sales tax by province: HST, GST+PST, or GST only
TFSA Contribution Room Calculator
Cumulative TFSA room from 2009 to today
RRSP Contribution Limit Calculator
18% of earned income vs the annual cap, whichever is lower
Canadian Mortgage Calculator
Monthly payment with legally required semi-annual compounding
Rule of Three Calculator
Direct and inverse proportion, A:B = C:X
Fuel Cost Calculator
Trip fuel amount and cost from distance, efficiency, price
Wind Chill Calculator
NOAA wind chill formula from temperature and wind speed
Heat Index Calculator
NOAA Rothfusz heat index from temperature and humidity
Concrete Calculator
Volume and bag count for slabs, cylinders and footings
Aguinaldo Calculator (Mexico)
Minimum 15 days' salary, LFT Art. 87
EMI Calculator
Monthly loan installment (India)
Severance Pay Calculator (Korea, pre-tax)
Average wage method, pre-tax gross amount
Housing Subscription Score Calculator (Korea)
84-point scale: no-home period, dependents, account age
Argentina VAT (IVA) Calculator — 21%, 10.5%, 27%
General, reduced and utility rates, forward & reverse
Data Duration Calculator
How long 1GB lasts by app (YouTube, Netflix...)
Generator Fuel Consumption Calculator
Litres/hour, Naira cost per day/month, tank runtime by kVA
Japan Specific Relative Deduction
Tokutei Shinzoku Tokubetsu Kojo, full 9-band table
Japan Vacant House Property Tax
Advisory-stage 6x land tax hike, normal vs. after advisory
Korea Newborn Special Loan Calculator
Didimdol/Beoteommok eligibility self-check + monthly payment
Korea Parental Leave Benefit Calculator
Standard + 6+6 Parental Leave, combined for both parents
Japan High School Tuition Support Calculator
National support cap by school type, no income test for Japanese nationals in FY2026
Brazil Pé-de-Meia Calculator
Simulate the total value of Brazil's Pé-de-Meia student savings program
France Retirement Age Calculator
Legal retirement age, quarters required and long-career eligibility, with the 2026 suspension applied
Cups to Grams Converter
Flour, sugar and butter — verified USDA reference weights
Carry-On Size Checker
Check your bag against 8 airlines' carry-on limits at once
Bra Size Calculator
Band & cup size — US/UK, EU, France, Japan/Korea
IU to mcg Converter
Vitamin D, A, E — IU/mcg/mg
Unit Converter
Length, weight, temperature
Data Storage Converter
Convert between Bit, Byte, KB, MB, GB, TB, PB
Time Converter
Convert between ms, s, min, h, day, week, month, year
Temperature Converter
Celsius, Fahrenheit and Kelvin — live conversion
Japanese Era Converter (Wareki)
Meiji, Taisho, Showa, Heisei, Reiwa ↔ Western year
Kanji Number Converter
Arabic numbers to kanji: regular, daiji, or 万億兆
Number to Words Converter
Spell out numbers in Spanish or English for checks
Tire Size Calculator
Diameter, circumference and speedometer error from tire size
Meat Internal Temperature Chart
USDA safe minimum temperatures for beef, pork, poultry, fish and eggs
Nutrient RDA Calculator
RDA by country: US, Korea, Japan, EU
Growth Percentile Calculator
WHO weight, height & head % for babies
Child Height Predictor
Adult height from parents' height
BMI Calculator
Body mass index & healthy weight
Body Fat Calculator
Body fat % — US Navy method
Calorie Calculator
BMR and daily calorie needs (TDEE)
Due Date Calculator
Pregnancy due date from your last period
CDCP Cost Calculator
Estimate your co-pay + overage under Canada's dental plan
Schengen 90/180 Calculator
Rolling 180-day window: days used, remaining, reset date
Age Calculator
Age in years, months, days
Lunar Calendar Converter
Convert dates between solar and lunar calendar, 1900-2100
Days Until Calculator
Days until a date or between two dates
Age Chart by Birth Year
Birth year, era, zodiac, age at a glance
Javanese Weton Calculator
Day + 5-day pasaran cycle from a birth date
Military Discharge Date Calculator (Korea)
Discharge date, D-day, service progress by branch
Password Generator
Random secure passwords, strength check
Base64 Encoder/Decoder
Encode or decode Base64 text instantly
Color Converter
HEX to RGB and HSL with color preview
Number Base Converter
Convert between binary, octal, decimal, hex
Aspect Ratio Calculator
Find missing width or height while keeping the aspect ratio
Hash Generator
SHA-1, SHA-256, SHA-384, SHA-512 from any text
UUID Generator
Generate v4 UUIDs one at a time or in bulk
Unix Timestamp Converter
Timestamp to date/time and back, UTC and local
JSON Formatter
Beautify, minify and validate JSON in one click
URL Encoder / Decoder
Encode or decode URL components instantly
Text Diff Checker
Compare two texts, see added and removed lines
JWT Decoder
Decode a JWT's header and payload, view exp/iat dates
Case Converter
UPPER, lower, Title, Sentence case
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words
Word Counter
Words, characters, sentences, paragraphs, reading time
Work Hours Calculator
Clock-in/out times with breaks, daily and weekly totals
Character Counter
Characters, words, lines and UTF-8 bytes
Fancy Text Generator
Decorative fonts, text emoticons, symbols and ASCII art
QR Code Generator
Text or URL to a QR code, download as PNG
Text to Speech
Read any text aloud with adjustable voice, speed, pitch
Image Compressor to KB
Compress a photo to an exact KB target (20/50/100/200KB)
Image Resizer
Resize and compress images locally, no upload
Manuscript Paper (Genkoyoshi) Counter
Character count to 400-character manuscript sheets
Spanish DNI/NIE Letter Calculator
Calculate or validate the check letter for DNI/NIE
Chilean RUT Validator
Validate or calculate the Chilean RUT check digit
CPF Generator & Validator
Validate or generate a Brazilian CPF check digit (mod-11)
Annual Leave Calculator (Korea)
Days accrued by tenure, plus unused-leave payout
CUIT/CUIL Calculator (Argentina)
Check digit from DNI and type, modulo 11
NRIC / MyKad Number Parser (Malaysia)
Birth date, state code, gender from the 12-digit ID
GWA Calculator (Philippines)
Philippine 1.00-5.00 weighted average — lower is better
GPA Calculator
Weighted GPA from course grades and credits
Grade Average Calculator
Weighted average on 0-10, 0-20 or 0-100 scales
JAMB Aggregate Score Calculator
UTME + Post-UTME aggregate out of 100
WASSCE Aggregate Grade Calculator
Best 6 subject grades, lower total is better
KCSE Mean Grade Calculator
Mean points and mean grade from subject grades
APS Calculator
Admission Point Score from 6 subject levels
CGPA to Percentage Calculator
CBSE and VTU formula, both directions
Vietnam Grade Average Calculator (TT22)
Semester & annual averages per Circular 22
Random Number Generator
Generate random integers with min, max, count, unique
Dice Roller
Roll d4/d6/d8/d10/d12/d20/d100, up to 10 dice
Coin Flip
Flip a coin, track heads vs tails tally
Spin the Wheel
Spin a wheel to pick a random name or item
Reaction Time Test
Measure your click reaction speed in milliseconds
Fortune Cookie Generator
Crack open a cookie for a random saying
Typing Speed Test
Type words for 60 seconds, measure WPM and accuracy
Click Speed Test
Measure clicks per second (CPS) in 1, 5 or 10 seconds
Morse Code Translator
Translate text to Morse code and back
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals
NATO Phonetic Alphabet
Spell any text using NATO phonetic words
Full-width / Half-width Converter
Convert letters, numbers, kana between zenkaku and hankaku
Hiragana ↔ Katakana Converter
Convert Japanese text between hiragana and katakana
Vietnamese Fancy Text Generator
Bold, italic fonts that keep tone marks