Loft & Interior Space-Planning Calculators
Free, practical tools for planning a loft or small apartment — measure floor area, set a sensible rent budget, size up paint and lighting, compare spaces by cost per square foot, and work out the room volume that heating and cooling depend on.
Square Footage Calculator
Total up the floor area of one room or a whole loft from length × width, in square feet and square metres.
Rent Affordability Calculator
See the rent you can comfortably afford from your income using the 30% rule, plus a conservative 28% figure.
Paint Calculator
Estimate litres and gallons of paint from a room's perimeter and ceiling height, minus doors and windows.
Lighting Calculator
Work out the lumens a room needs from its area and purpose, then how many fixtures that takes.
Cost Per Square Foot Calculator
Turn a price and floor area into cost per square foot and metre, and compare two spaces side by side.
Ceiling Volume Calculator
Get a room's volume in cubic metres and feet for heating, cooling, and ventilation sizing in tall lofts.