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35 calculatorsVAT Calculator
Add VAT to a net amount or take it back out of a gross one — the VAT, the net and the gross together, at the standard, reduced, zero or any custom rate.
Invoice & Quote Total
Add line items with quantity and unit price — each amount, the net subtotal, tax and the invoice total update as you type. Apply an overall discount for quotes.
Stress–Strain Curve
Approximate a material's engineering stress–strain curve with the Ramberg–Osgood equation — strain hardening exponent, yield and failure strains, and the full interactive curve from four material properties.
Bolt Pattern Force Distribution
The elastic-method load on every bolt of an in-plane pattern under an eccentric force — centroid, direct shear and the critical bolt's load, straight from the bolt coordinates.
Miles to Kilometres
Convert miles to kilometres, metres and feet instantly.
GPA Calculator
Your grade point average on the 4.0 scale — add each course with its credits and letter grade, and the GPA, total credits and quality points update as you type.
Profit Margin
Margin, profit per unit and markup from a selling price and unit cost.
Fuel Cost
What a trip costs in fuel, from distance, consumption and fuel price.
XP per Hour
Your grind rate — experience earned divided by hours played.
Freelance Day Rate
Work out the day rate you need from your target take-home, business costs and billable days.
Daily Travel Budget
How much you can spend per day from your total trip budget.
Running Pace
Your pace per kilometre from distance and finish time.