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Currency & unitsUSD · Imperial

Using USD and Imperial. You can change either choice.

Currency changes the unit of your amounts, not their value. No exchange rate or country-specific tax, benefit, or lending rule is applied. Money results and loan schedules retain the calculators’ two-decimal precision; this does not apply local cash-rounding rules.

Measurement changes convert valid existing quantities. Incomplete entries stay as typed; finish them using the units shown. Other units stay as labeled. Enter numbers as 1,234.56; a decimal comma is not supported.

Initial suggestions use only your browser’s language region. Choices are saved on this browser; no location lookup is used.

Interior Calculators

Accurate spacing for wall trim and panels. Choose a tool below for instant results, formulas, and examples.

Board and Batten CalculatorPlan equal board-and-batten spacing on one wall. Choose whether edge battens are included and see clear gaps, center spacing, and batten positions.Wainscoting CalculatorCalculate equal wainscoting panel openings and basic rail-and-stile material for one wall. Enter panel count, side margins, trim width, and height.