Free Tools

Tools for Architects

Practical online calculators and converters built for everyday architectural work. No signup required.

📐

Drawing Scale Converter

Convert between real-world measurements and drawing dimensions across any architectural scale.

CAD Drawing Scales
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🏠

Room Area Calculator

Calculate floor area for simple and complex room shapes. Shows m² and ft² instantly.

Area Rooms Metric / Imperial
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💼

Architect Fee Calculator

Estimate professional fees based on project type, construction cost, and RIBA work stages.

Fees RIBA Project Management
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🪜

Staircase Calculator

Calculate riser count, rise and going dimensions, total run and building regulation compliance.

Stairs Building Regs UK Part K
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🧱

Concrete Volume Calculator

Calculate concrete volume and weight for slabs, columns, beams and footings with bag estimates.

Volume QS Structural
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🪟

Window-to-Floor Ratio

Calculate WFR and estimated daylight factor for any room. Check against building regulation minimums.

Daylight WFR Building Regs
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⚖️

AEC Unit Converter

Convert length, area, and volume units used in architecture — mm, cm, m, ft, in, yards and more.

Length Area Volume
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🏠

Roof Pitch Calculator

Calculate roof pitch angle, ratio, slope percentage and rafter length from rise, run or angle.

Roof Pitch Rafter
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🚗

Car Park Calculator

Calculate parking space count, efficiency percentage and layout from total area and bay dimensions.

Parking Layout Planning
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📊

Plot Ratio Calculator

Calculate FAR, site coverage and GIA from site area. Check against planning limits.

FAR Planning GIA
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🌡️

U-Value Calculator

Build up wall, floor or roof layers and calculate U-value. Check compliance with UK Part L.

Thermal Insulation Part L
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🎨

Paint Coverage Calculator

Calculate litres of paint needed for walls, ceiling and trim with door and window deductions.

Paint Coverage Finishes
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☀️

Sun Hours Estimator

Estimate peak sun hours and solar gain by city, season and facade orientation.

Solar Orientation Passive Design
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🔩

Steel Beam Size Calculator

Calculate required section modulus, bending moment and shear force. Suggests nearest standard UB size.

Structural Steel Beams
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🧱

Brick & Block Calculator

Calculate number of bricks or blocks for a wall with mortar volume, deductions and wastage.

Masonry QS Walls
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⚙️

Rebar Calculator

Calculate rebar count, total length and weight for slabs, beams, columns and foundations.

Structural Reinforcement Steel
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🔲

Tile Calculator

Calculate tile count, adhesive and grout needed for floors and walls with pattern wastage.

Finishes QS Tiling
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🚨

Fire Escape Distance Checker

Check travel distance compliance, exit width and occupancy against Approved Document B.

Fire Safety Building Regs Part B
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📏

Minimum Room Size Checker

Check room dimensions and GIA against UK Nationally Described Space Standard (NDSS).

Housing Space Standards NDSS
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💨

Natural Ventilation Calculator

Calculate purge vent area, trickle vent requirement and extract rates per UK Part F.

Ventilation Part F Air Quality
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Slope & Ramp Calculator

Calculate gradient, slope angle and ramp length with DDA/ADA/Part M compliance check.

Accessibility Ramps Part M
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🏗️

Column Grid Spacing Tool

Plan structural grids, calculate tributary areas, column loads and preliminary sizing.

Structural Grid Planning Columns
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💰

Construction Cost Estimator

Rough order of magnitude cost estimate by building type, quality level and region.

Cost QS Estimating
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📅

Project Timeline Estimator

Estimate project duration across RIBA stages with Gantt-style timeline by project type and scale.

RIBA Timeline Project Planning
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