Finance Calculators

Everyday money calculators that do the arithmetic for you. Value gold at the rate you type, in tola, masha, ratti, grams or troy ounces at any karat, and see a jewellery bill with making charges and tax or what old gold should fetch. Work out a sale price and how much you save at any percent off, with optional sales tax; calculate a tip, split the bill and round each share up; and price 3D prints so each sale covers filament, electricity, machine wear, failed prints, your time and marketplace fees. These tools do maths, not financial advice: each one shows its formula and a worked example so you can check the numbers yourself.

Shopping & discounts

  • Tip CalculatorWork out the tip and total for any bill, split it between people and round each share up to a whole dollar.
  • Percent Off and Percentage CalculatorSale price and savings at any discount, P% of a number, what percent X is of Y, and percentage change or difference.

Gold & jewellery

  • Gold CalculatorEnter today's rate and value gold in tola, masha, ratti, grams or ounces at any karat, with making charges, tax and resale deductions.

Pricing & business

  • 3D Printing Cost CalculatorWhat a print really costs (filament, power, wear, failed prints, your time) and a price that keeps your margin after fees.

Worked answers