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Mechanical EngineeringP0

Tank Surface Area Calculator

Calculate surface area of cylindrical tanks for painting, insulation, and heat transfer estimates.

Inputs
Enter your values below
Result
Total Surface Area
—
Enter values and click Calculate
Formula
(2 × π × (diameter ÷ 2)² + π × diameter × height)
Result unit: m²

Surface area = 2πr² (top+bottom) + πD×L (shell). For open-top tanks, subtract one circular end.

Introduction

Calculate the total external surface area of a closed-top vertical cylindrical tank (including roof and floor). Used for estimating paint quantities, insulation area, and external heat transfer.

Calculation Example

3m × 6m tank: shell 56.5 m² + roof/floor 14.1 m² = 70.7 m² total.

Inputs: diameter=3, height=6
Result: 70.7 m²

Engineering Applications

  • •Paint estimating
  • •Insulation takeoff
  • •Heat loss calc
  • •Coating inspection

Frequently Asked Questions

How much paint do I need?

Industrial epoxy covers 6-8 m² per liter at standard dry film thickness. For 70.7 m² with 2 coats: ~18-24 liters.

What about insulation thickness?

Surface area increases with insulation O.D. — add 2× insulation thickness to diameter for exterior surface. For 50mm insulation on 3m tank, use 3.1m effective diameter.

Related Calculators

Tank Weight CalculatorHeat Loss Calculator - Pipe & Tank Insulation

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Disclaimer: Calculations are for reference and educational purposes only. Always verify results independently for engineering design. See full disclaimer.