User Rating 0.0
Total Usage 0 times
Total Length:0.00 m
Is this tool helpful?

Your feedback helps us improve.

About

Ordering reinforcement steel (rebar) is typically done by weight (Tons), but on-site construction application is measured in length (Meters). To reconcile the order against the structural drawings, engineers must convert the delivered tonnage into running meters. This calculation varies exponentially with the diameter of the bar.

This tool uses standard ISO/DIN specific weights to perform the conversion accurately. It eliminates the need for manual lookups in steel tables and allows for summing multiple batches of different diameters, which is crucial for verifying delivery notes against structural schedules.

rebar calculator steel weight construction estimation reinforcement concrete steel

Formulas

The formula derives length from the total mass and the specific linear density of the steel.

Lm = Wtons × 1000wspec

Where wspec is the specific weight in kg/m.

Reference Data

Diameter (Ø)Weight (kg/m)Meters per 1 Ton
6 mm0.2224,504.5
8 mm0.3952,531.6
10 mm0.6171,620.7
12 mm0.8881,126.1
16 mm1.580632.9
20 mm2.470404.9
25 mm3.850259.7
32 mm6.310158.5

Frequently Asked Questions

It uses the standard theoretical weights derived from the density of steel (7850 kg/m³). These values align with ISO 6935-2 and most national standards (ASTM, BS, DIN) for deformed bars.
No. Steel mills have a rolling tolerance (usually ±3-5%). This calculator uses the theoretical nominal weight. Actual delivered length may vary slightly based on the specific mill's tolerance.
Yes. Use the "Add Batch" feature to calculate the length for a specific diameter and weight, then add it to your total list below.