Financial Calculators
Free money calculators for interest and savings, VAT, discounts, markup and investment income. Enter your figures and see the result straight away.
9 calculators each one also works as a widget
Interest, savings and investing
5- Compound Interest Calculator See how savings grow with compound interest, with the compounding frequency you choose.
- Interest Calculator Simple and compound interest on a loan or an investment.
- Dividend Calculator Estimate dividend income and yield, and project growth with dividends reinvested (DRIP).
- Crypto Staking Calculator Estimate staking rewards from the APY, with and without compounding.
- Basis Points Calculator Convert basis points to percent and decimals, and see what a change in bps means in dollars.
Prices, tax and shopping
4- VAT Calculator (Gross/Net) Add VAT to a net price, or take it out of a gross price.
- Discounts & Promotions Calculator Work out sale prices, how much you save and what a promotion or rebate is worth.
- Markup Calculator Find the selling price, markup, cost or profit margin from the figures you know.
- LEGO Price Per Piece Calculator Compare LEGO sets by price per piece to see which one is the better deal.
Which Financial Calculator Do You Need?
For savings and loans, the Compound Interest Calculator shows how a balance grows when interest is added to it, and the Interest Calculator compares simple and compound interest. Investors can estimate income with the Dividend Calculator or the Crypto Staking Calculator. The Basis Points Calculator turns rate changes quoted in bps into percent and dollars.
For prices, the VAT Calculator adds tax to a net price or takes it out of a gross price. The Discounts Calculator works out sale prices and savings, and the Markup Calculator connects cost, selling price, markup and margin. The LEGO Price Per Piece Calculator compares sets by value.
Markup Versus Margin
Both compare profit with a price, but against different bases. Markup is profit divided by cost; margin is profit divided by the selling price. An item that costs $50 and sells for $75 makes $25 of profit, which is a 50% markup and a margin of about 33.3%.
Treat the Results as Estimates
These calculators do the arithmetic on the figures you enter. Real accounts can add fees, taxes and changing rates, so use the result as an estimate and check big decisions with your bank, your tax office or a financial adviser.
Simple Interest Versus Compound Interest
Simple interest is paid on the starting amount only. Compound interest is paid on the starting amount plus the interest already earned, so it grows faster the longer you leave it. $1,000 at 5% a year for 10 years earns $500 of simple interest and ends at $1,500. Compounded yearly, the same money ends at about $1,628.89.
How often interest is added also matters. Monthly or daily compounding gives a slightly higher result than yearly compounding at the same rate, which is why savings accounts quote an APY (annual percentage yield) next to the plain rate. The Compound Interest Calculator lets you change the frequency and see the difference.
VAT and Sales Tax
VAT is already included in shop prices in the UK and the EU, so the useful question is often how much of a price is tax. US sales tax is usually added at the till instead. The math for adding or removing a percentage tax is the same either way: multiply by 1 plus the rate to add it, and divide by 1 plus the rate to take it out.
Frequently Asked Questions
How does compound interest work?
Interest is added to the balance, and the next period's interest is paid on the new, larger balance. $1,000 at 5% a year, compounded yearly, grows to $1,050 after one year and $1,102.50 after two.
How do I take VAT out of a price?
Divide the gross price by 1 plus the VAT rate. With 20% VAT, a gross price of £120 is 120 ÷ 1.2 = £100 net, so the VAT is £20.
What is a basis point?
One basis point is one hundredth of a percent, or 0.01%. A rate that rises from 4.25% to 4.50% has gone up by 25 basis points.