KahurTools — Free Online Calculators

19 calculators

Live Nord Pool spot prices for Estonia — find the cheapest hours and decide when to run your appliances.

Calculate the gross pay reduction for unpaid absence hours.

Calculate net salary, total employer cost, and the breakdown of payroll taxes for Estonia.

Calculate the real value of money over time — see how inflation erodes purchasing power.

Calculate working days, public holidays, and shortened workdays for any period.

Convert between major currencies using official European Central Bank daily rates.

See how your savings or investment grow over time with compounding interest.

Calculate percentages instantly. Fill any two fields — the third is computed automatically.

Calculate profit margin vs markup — understand the difference and optimise your pricing.

Find the exact sales volume needed to cover all your costs and break even.

Generate or validate SEPA RF creditor references. Create QR codes for SEPA payments (mobile banking compatible).

Estimate YouTube ad revenue, CPM, RPM, and total earnings from your view count.

Answer 8 questions about your public Wi-Fi habits to get a personal safety score from 0 to 100.

Calculate affiliate earnings based on sale value, commission rate, and volume.

Free WordPress security scanner — detects malware, viruses, exposed files, known CVEs and 30+ threats

Calculate exact Stripe processing fees and net payout for any transaction amount.

Find out how much PayPal takes from each payment and what you actually receive.

Generate a full amortization schedule showing monthly payments, interest, and principal.

Convert between annual salary, monthly pay, and hourly rate in both directions.