Online Calculators
Financial, health, and everyday calculators for quick answers.
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Guides
Car Loan EMI Explained: Down Payment vs Tenure Trade-offs
Car loan EMI explained with real numbers: how down payment and tenure change your EMI, total interest, and the true cost of the loan.
Flat Rate vs Reducing Balance: The Interest Trick Lenders Use
Flat rate vs reducing balance: why an 8% loan can cost more than a 14% one, with a worked example and the questions to ask your lender.
How Much to Invest Monthly to Reach $1 Million
How much do you need to invest monthly to reach $1 million? Real figures for 15, 20, 25 and 30 years, plus the mistakes that slow you down.
How Much House Can I Afford on a $100,000 Salary?
On $100,000 a year, the 28/36 rule points to a home of about $300,000 with $40,000 down at 7.4%. See how debts, down payment and rates change it.
UK Mortgage Overpayments: How Much Interest You Save
Overpaying £200 a month on a £200,000 mortgage at 4.5% saves £36,280 of interest and 6 years. See monthly and lump-sum tables, and the 10% rule.
How to Write an Invoice (US & UK): What It Must Include
What an invoice must show in the UK and US, the extra details on a VAT invoice, how to number invoices, add tax and discounts, and set payment terms, with a worked example.
Rent vs Buy: When Does Buying Beat Renting? (US & UK)
How long you need to stay for buying a home to beat renting, with worked US and UK examples and what changes the answer: prices, rent, rates and returns.
UK Take-Home Pay 2026/27: Salary After Tax, £20k to £150k
What you take home from a UK salary in the 2026/27 tax year after income tax and National Insurance, from £20,000 to £150,000, for England, Wales, NI and Scotland.
Debt Snowball vs Avalanche: Which Pays Off Debt Faster?
How the debt snowball and debt avalanche methods work, worked examples showing the interest and time each saves, and how to choose, with a free payoff calculator.
Is Solar Worth It? Payback by US State and UK Region
How long solar panels take to pay for themselves in all 50 US states, DC and 7 UK regions, from 2026 electricity prices, installed costs and modelled sunshine.
How to Calculate Your Monthly Electricity Bill
Learn how to estimate your electricity bill by adding up appliance wattages and daily usage hours.
About Our Free Online Calculators
Our calculators go beyond basic arithmetic — compute EMI repayments, BMI, compound interest, mortgage payments, SIP returns, GST breakdowns, age, date differences, and more. All results are instant and accurate.
Every calculator runs entirely in your browser with no server calls, giving you instant results and keeping your financial or personal data completely private.
Whether you're planning a home loan, tracking your fitness goals, or estimating your investment returns, our free calculators make it easy. No registration, no ads blocking results, just fast and reliable answers.