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Free engineering calculators

Early-estimate tools that run in your browser without registration. Figures are indicative for planning and requesting offers; they do not replace a bill of quantities taken off drawings. The formula used is stated under each calculator.

Paint calculator

Litres of paint and number of containers for walls and ceilings.

Formula: Net area = (length × height − openings) + ceilings; litres = area × coats ÷ coverage. Coverage of 10–12 m²/L is typical for emulsion on skimmed surfaces (the manufacturer data sheet governs).

Tile & flooring calculator

Number of pieces and boxes including waste, and an indicative tile-adhesive quantity.

Formula: Pieces = area ÷ ((width + joint) × (length + joint)) × (1 + waste). Use 10% waste for straight laying and 15% for diagonal or complex patterns. Adhesive is indicative at 4.5 kg/m² for an 8–10 mm notched trowel.

Concrete calculator

Concrete volume in cubic metres, truck loads and an early reinforcement estimate.

Formula: Volume = count × length × width × thickness × (1 + waste). Steel rates are common indicative figures for early estimates only; the actual quantity comes from structural drawings and bar bending schedules.

Plaster (render) calculator

Cement and sand for cement plaster at a 1:4 mix.

Formula: Wet volume = area × thickness; dry volume = wet × 1.27 (sand bulking and voids) × (1 + waste). Cement = dry ÷ (1 + ratio) × 1440 kg/m³ ÷ 50 kg per bag; sand = dry × ratio ÷ (1 + ratio). A common site-practice rule of thumb.

Unit converter

Quick conversion between metric and imperial units common in drawings and specifications.

Formula: SI conversion factors: 1 ft = 0.3048 m, 1 in = 25.4 mm, 1 lb = 0.45359 kg, 1 kgf = 9.80665 N, 1 psi = 0.0068948 MPa.

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Send your drawings or a short project brief, and we will respond with a scope of work and a quotation.

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Saudi Arabia: mobile & WhatsApp +966 59 700 9855
Egypt: mobile & WhatsApp Business +20 111 256 5999
Email a.fathy@arabcreators.co
Head office 15th of May City, Cairo
Riyadh Office being established
Working hours Sun – Thu · 9:00 am – 5:00 pm
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