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200+ calculators that don't just spit out a number — they explain what it means, show the formula and lead you to the right decision. From mortgages to BMI, VAT to tips.
Calculations use standard financial and medical formulas — no hidden fees.
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Not just a number — formula, steps, examples and common mistakes.
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29 calculator
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30 calculator
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6 calculator
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12 calculator
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16 calculator
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Popular calculators
Mortgage calculator
Calculates your monthly mortgage payment, total interest paid and full amortization schedule. Shows…
Loan payment calculator
Computes the monthly payment, total interest and total cost of any personal or consumer loan. Compare bank…
Car loan calculator
Shows the monthly payment for a car loan given price, down payment, rate and term. Use it before you walk…
Compound interest calculator
Projects how much your investment will grow over time with compound interest — a lump sum, regular…
VAT calculator
Adds or removes VAT from an amount in one click. Shows net, VAT amount and gross — essential for…
Tip calculator
Computes tip and splits the bill fairly between people. Works with any percentage (5–25%) and any currency.
Discount calculator
Shows final price after discount and how much you actually save. Handles single discounts (30%) or…
BMI (body mass index) calculator
Calculates Body Mass Index from your height and weight and tells you the WHO category — underweight,…
Calorie calculator
Estimates daily calorie needs based on sex, age, weight, height and activity level. Shows targets for…
Percentage calculator
Computes X% of a number, what percent one number is of another, and the % change between two values. The…
Age calculator
Exact age in years, months, days, hours and minutes from birth date to any target date. Useful for legal…
Universal unit converter
Universal unit converter — accurate calculation with explanations, formula and examples. Understand how it…
Local context: Singapore parameters
Singapore's rules are unusually flat and predictable, and Kalkulatora.net reflects that structure directly.
Key local facts
- Currency: Singapore dollars, S$1,234.56. GST is currently 9% and shown inclusive on most consumer prices.
- Income tax: Progressive resident rates from 0% up to 24%, with no capital gains tax and no inheritance tax.
- CPF: Mandatory CPF contributions from both employer and employee, split across Ordinary, Special and MediSave accounts by age band.
- Units: Metric — km, kg, °C, litres — with residential space quoted in square feet despite the metric norm.
- Power: 230 V / 50 Hz with Type G plugs, and installations follow SS 638.
Local examples
- Example — CBD: An employee in the CBD uses Kalkulatora.net to separate CPF from take-home pay before budgeting.
- Example — HDB resale: A buyer checks an HDB resale figure with Kalkulatora.net, keeping stamp duty as a separate calculation.
Every figure above applies to Singapore specifically and is reviewed when the rules change.