Construction Calculators
9 tools- Concrete Calculator
Free online concrete calculator. Calculate cubic yards, cubic meters, and number of 60lb/80lb bags needed for slabs, footings, and columns.
- Rebar Calculator
Free online rebar calculator. Calculate linear feet of rebar, number of standard bars, and weight for concrete slabs. Supports #3 through #8 rebar sizes.
- Concrete Mix Designer
Concrete Mix Designer — Calculate concrete mix designs for structural concrete. Select standard nominal grades (C10 to C40) or input custom design ratio...
- Moment Resistance Calculator
Free online moment resistance calculator for reinforced concrete slabs. Calculate ultimate design moment resistance (Mu) using rebar size, spacing.
- RC Slab Design
Design reinforced concrete slab flexural reinforcement per ACI 318M-19. Calculates required steel area, bar spacing, and checks tension-controlled status.
- RC Beam Design
Design reinforced concrete beam flexural reinforcement per ACI 318M-19. Supports rectangular and T-beams. Checks compression steel requirements.
- RC Shear Design
Free online rc shear design. No signup, no upload — works entirely in your browser. Fast, private, and free forever.
- RC Column Design
Free online rc column design. No signup required.
- RC Footing Design
Free online rc footing design. No signup required.