Complete Tools Directory

All Online Utilities & Calculators

Browse our comprehensive catalog of 50+ verified mathematical, financial, construction, and everyday tools.

Roofing Shingles & Slope Area Calculator

Calculate the true pitched roof surface area, roofing squares, bundles of shingles, and underlayment rolls based on footprint and pitch slope.

Calculate how many sheets of drywall (gypsum board), screws, joint tape, and compound you need for room walls and ceiling.

Calculate how many liters or gallons of paint you need to paint a room or surface, minus doors and windows.

Calculate the number of tiles, boxes, and total square meters needed for floor or wall tiling with cutting waste.

Calculate the square footage (sq ft) and square meters (m²) of rectangular, triangular, or circular rooms and projects.

Calculate the cubic meters, cubic yards, and number of standard pre-mix bags required for a concrete slab, patio, or footing.

Convert energy units between Joules, Kilojoules, Kilowatt-hours (kWh), Calories, Kilocalories (kcal), and British Thermal Units (BTU).

Convert digital data sizes between bytes, kilobytes, megabytes, gigabytes, terabytes, petabytes, and bits.

Convert speed between kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), knots, and feet per second.

Convert land and surface areas between square meters, square kilometers, hectares, ares (сотка), acres, square feet, and square yards.