Calculate the amount of steel needed for the reinforcement of concrete structures based on the area.
The reinforcement calculator calculates the need for steel reinforcement (rebar) in concrete structures based on the area, structural thickness, and spacing of the reinforcement.
The calculator is free, works in the browser, and does not require registration. The site offers over 200 calculators with 2026 data.
Amount of steel (m) = (number of bars in the longitudinal direction + number of bars in the width direction) × length of the bars.
Fill in your information in the fields and press the calculate button – the result will appear immediately.
Slab 5 × 4 m, reinforcement spacing 200 mm, k12 steel → longitudinal bars 5÷0.2+1=26, width 4÷0.2+1=21, total of 47 pieces of steel in both directions × lengths.
Enter your own information into the calculator to get a personalized result.
The calculator is suitable for individuals, entrepreneurs, and professionals. All calculators on the site are free of charge.
The result is an estimate or calculated value – for official matters, verify the numbers with official sources or an expert.
Calculate the amount of steel needed for the reinforcement of concrete structures based on the area. Fill in the requested information in the form, and the reinforcement calculator will show the result instantly.
Yes, the reinforcement calculator is completely free and does not require registration. All FiksuLaskuri construction and home calculators are free of charge.
No. The calculations are done entirely in your browser and the data you enter is not sent or stored on the server.
The reinforcement calculator provides a good starting point for purchases, often with a small waste margin. For larger projects, it's advisable to request precise measurements and a quote from a professional.
Yes – at the bottom of the page, you can see other calculators related to the same topic that may also interest you.