Engineering Tools
Seismic Calculators
Free, browser-based tools for seismic base shear and lateral force calculations. All calculators export results to Excel.
Indian Standards (IS 1893)
IS Code
Latest
Base Shear & Lateral Storey Force
Equivalent static and Dynamic Linear Response Spectrum(modal) Analysis as per IS 1893 (Part 1): 2016.
- Zones II – V, Soil Types I / II / III
- Zone factor, Ah, Horizontal acceleration coefficient
- Storey-wise lateral force distribution
- Excel report export
IS 1893:2016 Calculator →
IS Code
Withdrawn
Base Shear & Lateral Storey Force
Updated for IS 1893 (Part 1): 2025 with revised site classes and return periods.
- Zones II – VI, Site Classes A / B / C / D
- Return period selection (75 – 9975 years)
- Updated spectral acceleration formulation
- Excel report export
IS 1893:2025 Calculator →
American Standards (ASCE 7)
ASCE 7-16
Seismic Base Shear & Lateral Storey Force
Equivalent lateral force procedure as per ASCE 7-16.
- Site Classes A – E, Risk Categories I – IV
- Fa, Fv, Ie, Cs computation
- DBE and MCE earthquake levels
- Excel report export
ASCE 7-16 Calculator →
ASCE 7-22
Latest
Seismic Base Shear & Lateral Storey Force
Latest ASCE 7-22 procedure using risk-targeted MCE ground motions.
- SMs, SM1 based inputs from ASCE Hazard Tool
- Risk Categories I – IV
- DBE and MCE earthquake levels
- Excel report export
ASCE 7-22 Calculator →
Coming Soon
IS Code
Natural Period of Building (IS 1893:2016 & 2025)
Empirical time period calculation based on building type, height, and structural wall density.
Coming soon
ASCE / IS
Design Response Spectrum Generator
Generate and plot design response spectra for IS 1893 and ASCE 7 codes.
Coming soon