Tool category
Free online calculators and number tools
Everyday calculations you often need, with the formula shown so you can check the result yourself.
12 tools · free · no account · updated
Numbers & Calculators tools
Percentage Calculator
Work out discounts, increases, differences and percentages, with the formula shown.
Open toolNumber to Words (Indonesian Terbilang)
Turn a number into its Indonesian spelling (“terbilang”), with rupiah.
Open toolAge Calculator
Work out your exact age in years, months and days, plus a birthday countdown.
Open toolDays Between Dates Calculator
Find the gap between two dates, or add and subtract days from a date.
Open toolBMI Calculator
Work out your body mass index and the normal weight range for your height.
Open toolVAT (PPN) & Discount Calculator
Add or separate VAT (PPN) from a price, with a discount and an adjustable rate.
Open toolLoan Installment Calculator
Simulate monthly flat and effective-rate installments, with an amortization table.
Open toolMargin & Markup Calculator
Work out margin, markup and selling price from your cost and target profit.
Open toolKPR Mortgage Calculator
Simulate a KPR mortgage with a fixed then floating rate, a schedule and upfront costs.
Open toolCompound Interest & Deposit Calculator
Work out compound interest growth and the after-tax return on a time deposit.
Open toolIndonesia Inflation Calculator
Value of money across years from official inflation data, and a purchasing power projection.
Open toolWorking Days Calculator (Indonesia)
Count working days between dates or add working days, with national holidays included.
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When should you use Numbers & Calculators tools?
This category gathers calculators for daily life and business: calculating percentages and discounts, writing numbers as words, working out age, the days between dates, and working days with national holidays, up to calculating VAT, loan installments, mortgages, compound interest and deposits, inflation, and sales margin.
Results are only a guide and not financial, tax or health advice. Double-check important figures before you rely on them.
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