Work out loans, wages, tax and savings in seconds. Every money calculator defaults to euros and also supports pounds and US dollars.
Our money calculators cover the sums people meet every month: repaying a mortgage or car loan, converting an hourly rate into a yearly salary, adding or removing VAT, tracking interest on savings and clearing credit card debt. Each tool shows its working, so you can see how the result was reached.
To calculate monthly loan repayments, enter the amount borrowed, the annual interest rate and the term in years. Our money calculators apply the standard amortization formula, then show the monthly payment, total interest and total cost, so you can compare offers from different lenders in euros, pounds or dollars.
Money tools default to euros, with pounds and US dollars one click away, and the formulas suit common UK, Irish and EU situations such as VAT rates, monthly loan repayments and overtime pay. Results are estimates for planning, not financial advice, but they give you a clear number before you speak to a lender or employer.
Plan repayments, salaries and VAT with clear working
The money calculators people return to most are the ones tied to a monthly bill: a mortgage or loan repayment, a salary conversion and a VAT sum. These three answer questions that come up every time you compare a quote, accept a job offer or price an invoice. Interest calculators come next, because savers want to know what a fixed rate will be worth in five or ten years.
A useful habit is to run the same question through two tools. For example, the mortgage calculator shows your monthly repayment, while the compound interest calculator shows what the same money could earn if you overpaid less and saved the difference. Seeing both figures side by side makes the trade off clear.
Salary questions are just as common. Someone paid 15 pounds an hour for 37.5 hours a week over 52 weeks earns 29,250 pounds before tax, and the hourly to salary calculator does that conversion instantly, and it works backwards from a salary too.
Every result shows the working, so you can check each figure against a lender’s illustration or a payslip. If the numbers differ, the cause is usually a fee, a different compounding period or a rounding rule, and the step by step view makes that easy to spot.
How Is a Monthly Loan or Mortgage Payment Calculated?
A fixed rate repayment uses one formula: payment = r × P ÷ (1 − (1 + r)^-N), where P is the amount borrowed, r is the yearly rate divided by 12 and N is the number of monthly payments. This is the standard amortization formula described in the Wikipedia article on mortgage calculators, and it is the core of every repayment calculator.
Take 200,000 borrowed at 6.5 percent over 30 years. The payment is 1,264.14 a month, and across 360 payments you repay about 255,089 in interest on top of the original loan. In the first month, 1,083.33 of the payment is interest and only 180.81 reduces the balance.
That split explains why early overpayments are so effective. Every extra pound paid in the first years cuts the balance on which future interest is charged, so a small overpayment can shorten the term by months or years. Always check your lender’s overpayment limits and any early repayment charges before you act.
The same formula works for car loans and personal loans. Compare offers by the total amount repaid, not just the monthly payment, because a longer term lowers each payment while adding thousands in interest.
How Do You Add or Remove VAT From a Price?
To add UK VAT at the standard 20 percent rate, multiply the net price by 1.2; to remove it, divide the gross price by 1.2. GOV.UK lists three UK rates: 20 percent for most goods and services, 5 percent for items such as home energy and children’s car seats, and 0 percent for most food and children’s clothes.
The most common mistake is subtracting 20 percent from a VAT inclusive price. On a 120 pound invoice that gives 96 pounds, but the correct net figure is 100 pounds, because the VAT was 20 percent of the net amount, not of the total. The same logic applies at the 5 percent rate, where you divide by 1.05.
Rates differ across Europe. EU law sets a minimum standard rate of 15 percent, and member states choose their own rate above that, so Ireland charges 23 percent as standard. When you invoice a customer in another country, check the rate that applies to them before you calculate.
Common money formulas and the question each one answers
Formula
What it answers
Worked example
Payment = r × P ÷ (1 − (1 + r)^-N)
Monthly loan or mortgage repayment
200,000 at 6.5% over 30 years = 1,264.14 a month
Interest = P × rate × years
Simple interest on a fixed sum
5,000 at 4% for 3 years = 600
A = P × (1 + r ÷ n)^(n × t)
Growth with compound interest
10,000 at 4% for 10 years, monthly = 14,908.33
Gross = net × 1.2
Price including 20% UK VAT
100 net = 120 gross
Net = gross ÷ 1.2
Price excluding 20% UK VAT
120 gross = 100 net
Salary = hourly rate × weekly hours × 52
Yearly pay before tax
15 × 37.5 × 52 = 29,250
Margin = (price − cost) ÷ price × 100
Profit as a share of the selling price
Cost 60, price 80 = 25%
Frequently Asked Questions
Are these money calculators free to use?
Yes. Every money calculator on ToolsVortex is free, needs no account and has no usage limit. You enter your figures, see the result instantly and can change any value to compare scenarios as often as you like.
Can I use euros and pounds instead of dollars?
Yes. Money calculators default to euros and let you switch to pounds sterling or US dollars. The currency setting only changes the symbol, so enter amounts in your own currency and read the result in the same one.
How accurate are the results?
Results use standard published formulas, so they are accurate for the numbers you enter. Real offers may differ because of lender fees, rounding rules, changing rates and local tax rules, so treat every result as a planning estimate.
Do the calculators work for UK and EU tax such as VAT?
The VAT calculator lets you enter any rate, so it works for the UK, Ireland and every EU member state, where standard rates differ. Check the current rate with your national tax authority before filing or invoicing.
Is my financial data stored or shared?
No. Calculations run in your browser and the figures you type are not saved to an account or sent to lenders. Closing or refreshing the page clears them, so you can test private numbers safely.
