Linkfa Tools

Free calculators that show their working.

Islamic finance

Zakat, inheritance and other calculations from the Quran and Sunnah, with the rule behind every number.

• Islamic inheritance calculatorEnter the estate, debts and bequest, then the relatives who survived. You get every heir's exact share and amount, the verse or hadith it comes from, and who is excluded and why.
• Zakat calculatorEnter your savings, gold and silver by weight, business stock and debts. You get the zakat due at 2.5%, the nisab on both standards and the full working.
• Zakat on gold calculator (UK)List your gold piece by piece with its weight and hallmark. You get the pure gold in each, whether the total meets the gold nisab, and the zakat to give in grams of gold or in pounds.

UK tax and pay

Income tax, National Insurance and allowances for England, Wales and Northern Ireland, from GOV.UK figures.

• Holiday pay calculator for irregular hours and part-year workersEnter the hours and pay from your payslips. You get the holiday you have built up at 12.07%, rounded per pay period as the law says, your rolled-up holiday pay, and a 52-week average if your employer pays holiday when you take it.
• UK 60% tax trap calculator (£100k trap), 2026/27Work out your income tax, National Insurance and lost Personal Allowance between £100,000 and £125,140, and how much pension it takes to get out of the 60% band.