Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse. New to Calculeaf? Start with your first worksheet or the examples guide.
22 examples found
Average Speed
Average speed of a journey from distance and time.
Specific Weight of a Fluid
Weight per unit volume of a fluid from its density.
Cylindrical Tank Volume
Volume of a vertical cylindrical tank from its radius and height.
Mass Flow Rate from Volume Flow
Mass flow rate of a fluid from its density and volumetric flow rate.
Pressure from Force and Area
Pressure exerted by a force distributed over an area.
Energy Conversion Efficiency
Efficiency of a device as useful output over energy input.
Mechanical Power
Average mechanical power from work done over a time interval.
Simple Interest
Simple interest earned on a principal over time.
Present Value
Present value of a future sum discounted at a given rate.
Payback Period
Simple payback period of an investment from its cost and annual saving.
Straight-Line Depreciation
Annual straight-line depreciation of an asset.
Efficiency of a Two-Stage System
Overall efficiency of two processes in series from their individual efficiencies.
Loan Amortization Monthly Payment
Fixed monthly payment that fully amortizes a loan over its term, given the loan amount, monthly interest rate, and number of payments.
Net Present Value of a Cash Flow Series
Present value of a series of future cash flows discounted at a given rate, net of the initial investment.
Internal Rate of Return (Single In/Out Cash Flow)
Annualized rate of return implied by a single investment that grows to a known future value after a fixed number of years.
Break-Even Point in Units
Number of units that must be sold for total revenue to equal total cost, from fixed costs, price, and variable cost per unit.
Unit Cost from Total Cost and Quantity
Average cost per unit produced, from total production cost and the number of units made.
Road Trip Fuel Cost Estimate
Estimated fuel cost for a road trip, from distance, vehicle fuel economy, and price per gallon.
Paint Coverage — Cans Needed for a Wall Area
Number of paint cans needed to cover a given wall area, from the coverage rate of a single can.
Concrete Slab Volume and Bag Count
Concrete volume needed for a rectangular slab and the number of pre-mixed bags required to supply it.
Electricity Cost from Energy Consumption
Cost of electricity consumed over a billing period, from energy used and the price per kilowatt-hour.
Material Cost from Unit Price and Quantity
Total material cost from the quantity needed and the price per unit.