Insulation Calculator
Estimate net insulation area and packages while checking R-value, cavity and product coverage separately.
Ajax Calculator
Instant answers. Zero reloads.
Ajax Calculator
Instant answers. Zero reloads.
Arefin Bappy
Owner, Admin, Developer, Author & Reviewer
Room Size Calculator
Calculate a rectangular room’s floor, ceiling, wall area, perimeter and volume from inside dimensions.
Air Conditioner Size Calculator
Estimate a room air conditioner’s preliminary BTU and tonnage range from dimensions and major load factors.
Door and Window Area Calculator
Total rectangular door and window opening area and perimeter while distinguishing unit and rough-opening sizes.
BTU Calculator
Estimate a preliminary room heating or cooling load from volume, temperature difference and major adjustments.
Basic Calculator
Perform everyday arithmetic with decimals, signs, parentheses and common percentage operations.
Scientific Calculator
Evaluate scientific expressions involving powers, roots, logarithms, constants and trigonometric functions.
Fraction Calculator
Calculate fraction operations, simplify the result and understand common denominators and reciprocals.
Mixed Number Calculator
Calculate with mixed numbers by converting whole-and-fraction parts to improper fractions and simplifying.
Decimal to Fraction Calculator
Convert terminating or repeating decimals to reduced fractions and mixed-number form.
Fraction to Decimal Calculator
Convert a fraction to terminating or repeating decimal form and understand when rounding is required.
Ratio Calculator
Simplify, scale and compare ratios or divide a quantity into proportional parts.