Free calculators that just work
Salary and tax, loans and savings, student tools, home projects, fitness and everyday math – clear answers in seconds, with the formulas explained. No sign-up, no clutter.
Salary & Tax (India)
In-hand salary, income tax, HRA, gratuity, hikes and notice period tools for Indian employees.
- CTC to In-Hand SalaryConvert your annual CTC into monthly in-hand salary for FY 2026-27. Accounts for PF, gratuity, professional…
- Gratuity CalculatorEstimate your gratuity using the 15/26 formula. Covers the 5-year rule, 1-year eligibility for fixed-term employees…
- HRA Exemption CalculatorCalculate tax-free HRA using the lowest-of-three rule. Updated for 2026 rules where Bengaluru, Hyderabad, Pune and…
- Income Tax: New vs Old RegimeCompare your income tax under the new and old regimes for FY 2026-27 (AY 2027-28). Enter…
- Last Working Day CalculatorEnter your resignation date and notice period (days or months) to get your exact last working…
- Salary Hike CalculatorFind your new salary after a percentage hike, or work out what hike percentage a new…
Loans, Savings & Investing
EMI and prepayment, SIP, PPF, FD, RD and GST calculators.
- FD CalculatorWork out fixed deposit maturity value and interest with quarterly, monthly or yearly compounding. See your…
- GST CalculatorAdd GST to a price or remove GST from an inclusive amount. Covers the new 5%,…
- Loan Prepayment CalculatorSee how much interest you save by prepaying your home, car or personal loan – with…
- PPF CalculatorCalculate your Public Provident Fund maturity amount and tax-free interest at the current 7.1% rate. Includes…
- RD CalculatorCalculate recurring deposit maturity value and interest using the quarterly compounding method banks and India Post…
- Step-Up SIP CalculatorCalculate the future value of a SIP that increases every year. Compare a step-up SIP with…
Student Tools
CGPA conversion and attendance calculators for college students.
Pay & Work
Hourly wage, overtime and tipping calculators.
- Hourly ↔ Salary ConverterConvert an hourly wage to annual, monthly, bi-weekly and weekly pay – or turn a yearly…
- Overtime Pay CalculatorCalculate overtime pay at time and a half (1.5×) or double time. Enter your hourly rate,…
- Tip & Split BillWork out the tip and split the bill between friends in seconds. Compare 10%, 15%, 18%,…
Home & DIY
Paint, tile, concrete and area calculators for home projects.
- Concrete Slab CalculatorCalculate how much concrete you need for a slab, patio or footing in cubic yards, cubic…
- Paint CalculatorEstimate how many gallons of paint you need for a room. Enter room size, doors, windows…
- Square Footage CalculatorCalculate area in square feet from length and width in feet, inches, yards, metres or centimetres.…
- Tile CalculatorCalculate how many tiles and boxes you need for a floor or wall, including a waste…
Health & Fitness
Running pace, sleep and hydration calculators.
- Running Pace CalculatorCalculate your running pace per kilometre and per mile, speed in km/h and mph, and predicted…
- Sleep Cycle CalculatorFind the best time to go to bed or wake up based on 90-minute sleep cycles,…
- Daily Water IntakeEstimate how much water to drink per day based on your weight, exercise and climate. Results…
Date & Time
Age, days between dates and date offset calculators.
- Add / Subtract DaysAdd or subtract days, business days, weeks, months or years from any date. Find what date…
- Age CalculatorCalculate exact age in years, months and days on any date – useful for exam and…
- Days Between DatesCount the number of days between two dates, plus weeks, months, years, weekdays (Mon–Fri) and weekend…
Math, Text & Conversions
Percentages, baking conversions and word counting.
- Cups to Grams (Baking)Convert cups to grams and grams to cups for flour, sugar, brown sugar, butter, milk, oats,…
- Percentage CalculatorFive percentage calculators in one: X% of Y, X is what percent of Y, percentage increase…
- Word & Character CounterFree online word counter: count words, characters (with and without spaces), sentences and paragraphs, and see…
Why CalcMate Pro?
- Up to date – Indian tax tools use FY 2026-27 rules, and rates such as PPF and GST are checked regularly.
- Explained – every calculator comes with the formula, worked examples and answers to common questions.
- Private – calculations run in your browser; we never ask for personal details.
- Free forever – the site is supported by ads.