About Interior Calculators

Interior Calculators is a free collection of precision tools for anyone planning a room. Whether you are sizing a rug for a living room, working out how much curtain fabric to buy, or checking a sofa fits with proper walkways, our calculators do the maths so you do not have to.

What we build

Every calculator on this site models a real design problem with transparent formulae. We explain what the inputs mean, show worked examples, and give reference tables so you can cross-check our recommendations. All calculators support both metric (cm, m, m²) and imperial (inches, feet, square feet) units.

Who we are

Interior Calculators is a product of Cloudo3, a small team building practical tools for everyday life. We focus on accuracy, speed, and clarity — no logins, no paywalls, no ads cluttering the results.

Accuracy & limitations

Our tools provide design estimates based on standard interior-design guidelines (CIBSE, SMPTE, and recognised furniture-sizing conventions). They are not a substitute for professional interior design advice. Always verify critical measurements in your own space before purchasing furniture, fabric, or fittings.

Contact

Questions, corrections, or suggestions? Email us at [email protected].