Safe Bearing Capacity Calculator

Calculate the approximate safe bearing capacity of soil using the field drop test method.

Calculation Formula:
R = (W × H) / d → SBC = R / (A × FOS)

1. Test Object

Select Test Object Weight of Object, W

Diameter of Ball, D

Area Used for Calculation

Projected Cross-Sectional Area
A = πD² / 4

Calculated Area, A— cm²

2. Height of Fall

Height of Fall, H

Enter the vertical height from which the test object was dropped.

3. Impression Depths

Enter the depth of impression obtained from different drops. The calculator will automatically determine the average depth.

Drop 1

Drop 2

Drop 3

Average Impression Depth, d— cm

4. Factor of Safety

Factor of Safety, FOS

Select the factor of safety to be used for the calculation.

Your Result

Average Impression Depth, d—

Area Used, A—

Ultimate Resistance, R—

Safe Bearing Capacity—

kg/cm²—

kPa / kN/m²—

tonne/m²—

Calculation Details

Important: This calculator provides an approximate result based on the field drop test method. The calculated value should not be used as the sole basis for foundation design. A proper geotechnical investigation and appropriate engineering assessment should be carried out for actual structural design.