151 tools in 12 categories
Free online tools
Free tools that work in your browser: Sri Lanka salary, tax, EPF and NIC tools, everyday calculators and unit converters, PDF, image, audio and video tools, and text, date, health and developer utilities. Every page explains how its answer is worked out, and the Sri Lankan ones name the official source they follow.
- Free, no sign-up
- Runs in your browser
- Files stay on your device
- Works on a phone
- Formulas and sources shown
Browse all tools
Sri Lanka
28 tools
Everyday Sri Lankan checks and calculators: NIC numbers, gratuity, EPF and ETF, loans and leasing, take-home pay.
- NIC number decoder
- Gratuity calculator (Sri Lanka)
- EPF & ETF calculator
- Loan & leasing calculator
- Net salary calculator (Sri Lanka)
- Sri Lanka public holidays 2027 & 2026
- Overtime pay calculator (Sri Lanka)
- Net to gross salary calculator (Sri Lanka)
- Annual income tax calculator (Sri Lanka)
- Service period calculator (Sri Lanka)
- Fixed deposit calculator (Sri Lanka)
- Treasury bill calculator (Sri Lanka)
- Rupees in words (cheques and invoices)
- Sri Lanka phone number checker
- Poya days 2026 and 2027 (Sri Lanka)
- Loan affordability calculator (how much can I borrow)
- Electricity bill calculator (CEB and LECO)
- A/L Z-score calculator and course checker
- Expressway toll calculator (Sri Lanka)
- Sri Lanka number plate checker
- Sri Lanka train times and line status
- Bus fare calculator (Sri Lanka, NTC)
- Sri Lanka traffic spot fines
- Gold jewellery price calculator (pavan and grams)
- VAT registration threshold checker (Sri Lanka)
- Income tax payment due dates (Sri Lanka)
- Rooftop solar payback calculator (Sri Lanka)
- SSCL calculator (Social Security Contribution Levy)
Calculators
18 tools
Percentages, interest, discounts, loans, statistics and everyday maths, worked out in your browser.
- Salary to hourly rate calculator
- Compound interest calculator
- Simple interest calculator
- Savings goal calculator
- VAT calculator (Sri Lanka)
- GPA calculator for Sri Lankan universities
- Exam marks percentage and average calculator
- Trip fuel cost calculator
- Percentage calculator
- Percentage change calculator
- Discount calculator
- Tip and bill split calculator
- Ratio calculator
- Fraction calculator
- GCD and LCM calculator
- Prime number checker
- Mean, median, mode and standard deviation calculator
- Quadratic equation solver
Converters
10 tools
Length, weight, area, volume, speed, data size and more, with the conversions people actually need.
- Length converter: feet, inches, cm, metres, miles
- Weight converter: kg, pounds, stone, ounces, tonnes
- Temperature converter: Celsius, Fahrenheit, Kelvin
- Area converter: perches, acres, roods, sq ft, hectares
- Volume converter: litres, gallons, cups, millilitres
- Speed converter: km/h, mph, knots, m/s and Mach
- Data size converter: MB, GB, MiB, GiB and megabits
- Fuel economy converter: km/L, L/100 km, mpg and MPGe
- Cooking converter: cups, tablespoons, ml and grams
- Time converter: hours, minutes, days and decimal hours
Date & time
8 tools
Age, date differences, countdowns, time zones and calendars, without signing up for anything.
- Buddhist Era (BE) year converter
- Age calculator (years, months and days)
- Days between two dates calculator
- Date calculator (add or subtract days, months, years)
- Day of the week calculator
- Colombo time converter (Sri Lanka time)
- Time zone converter for up to 6 cities
- Countdown to a date (days until an event)
Health
5 tools
BMI, calories, due dates and other health calculators, with the formulas explained. Not medical advice.
Documents
11 tools
Merge, split, compress, sign, and convert PDFs without uploading them anywhere.
Images
10 tools
Compress, resize, crop, and convert photos between JPG, PNG, WebP, and HEIC.
Audio & video
2 tools
Compress video, trim audio, and convert between common formats in your browser.
Generate
8 tools
Create QR codes, passwords, and identifiers - generated locally, never logged.
Text
18 tools
Count, compare, and reformat text without pasting it into someone else's server.
- Singlish to Sinhala converter
- Lorem ipsum generator
- URL slug generator
- Sort lines (A to Z, numeric, shuffle)
- Remove duplicate lines
- Remove line breaks and extra spaces
- Text to binary converter
- Morse code translator
- Caesar cipher and ROT13
- Palindrome checker
- Readability score calculator
- Keyword density checker
- Find and replace text
- Text reverser
- Text to speech reader
- FM Abhaya to Unicode Sinhala converter
- Word & character counter
- Case converter
Developer
27 tools
Everyday encoding, hashing, formatting, and inspection tools for building things.
- HTML entities encoder and decoder
- Markdown previewer
- CSS minifier and beautifier
- px to rem and em converter
- Colour contrast checker
- CSS gradient generator
- CSS box-shadow generator
- JSON to CSV converter
- CSV to JSON converter
- URL parser
- IPv4 subnet calculator
- Cron expression explainer
- Chmod calculator
- HTTP status codes reference
- Number base converter
- Roman numeral converter
- Password strength checker
- JSON formatter & validator
- Base64 encode & decode
- URL encode & decode
- Hash generator
- UUID generator
- JWT decoder
- Timestamp converter
- Diff checker
- Regex tester
- Colour converter
Productivity
6 tools
Timers, notes, random pickers and small helpers for getting things done.
Recently updated
- Trip fuel cost calculatorUpdated 28 October 2026
- Electricity bill calculator (CEB and LECO)Updated 28 October 2026
- A/L Z-score calculator and course checkerUpdated 28 October 2026
- Expressway toll calculator (Sri Lanka)Updated 28 October 2026
- Sri Lanka number plate checkerUpdated 28 October 2026
- Sri Lanka train times and line statusUpdated 28 October 2026
All converters and format tools
Frequently asked questions
Are these tools free?
Yes. Every tool is free. No account, no payment.
Do I need an account?
No. Open a tool and use it.
Are my files uploaded?
No. Every tool works inside your browser, so your files never leave your device.
Why does a tool not work in my browser?
A few tools need a newer browser feature. If yours does not have it, the tool tells you what is missing. Updating the browser usually fixes it.
Where do the Sri Lankan rules and rates come from?
From the official sources each page lists: the Acts, Inland Revenue Department notices, the Central Bank of Sri Lanka and the other bodies that publish them. Every Sri Lanka tool says when its rules were last checked and against which source, and several let you change a rate if the law changes first.
Are the results official?
No. The calculators are estimates to plan with, worked out from the published rules. Your payslip, your bank or the tax office has the final figure.
Will more tools be added?
Yes, this list keeps growing.