Rebar Weight Calculator — Nepal Steel Bar Estimator (D²/162.2)
Calculate total steel weight in kg and quintals for 8mm to 32mm TMT rebar bundles conforming to IS 1786.
Rebar Reinforcement Weight Calculator
Calculate structural steel weight based on standard nominal diameter sizes.
Calculated Weight
Formula Used: Rebar weight is computed using the standard structural density formula: W = (D² / 162) * L * Q, where D is the nominal diameter in millimeters, L is the length in meters, and Q is the quantity. This standard formula is derived from structural carbon steel weight density (7850 kg/m³).
Rebar Weight Calculation Formulas & Bar Sizes in Nepal
The standard unit weight of round steel reinforcing bars is derived from the density of mild/TMT steel (7,850 kg/m³). The universally applied formula in civil engineering is:
Where D is the nominal rebar diameter in millimeters. Standard manufacturing length for TMT rebar bundles in Nepal is 12 meters (approx. 40 feet).
| Bar Diameter (D) | Weight per Meter | Weight per 12m Bar | Typical Usage in Nepal |
|---|---|---|---|
| 8 mm | 0.395 kg/m | 4.74 kg | Column/beam stirrups & ties |
| 10 mm | 0.617 kg/m | 7.40 kg | Slab reinforcement, shear rings |
| 12 mm | 0.888 kg/m | 10.66 kg | Main slab bars, secondary beam bars |
| 16 mm | 1.578 kg/m | 18.94 kg | Main column bars, primary beam reinforcement |
| 20 mm | 2.466 kg/m | 29.59 kg | Heavy commercial columns & mat footings |