Construction

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Construction

Concrete Gutter Calculator.

Estimates the volume of concrete needed to fill a concrete gutter based on its length, width, and depth.

Results update live as you type.
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Your inputs

How it works

  1. 1

    Convert width and depth from inches to feet by dividing by 12.

  2. 2

    Multiply length (ft) by width (ft) and depth (ft) to get volume in cubic feet.

  3. 3

    Optionally divide by 27 to get cubic yards.

  4. 4

    Round to two decimal places for the final estimate.

length * (width/12) * (depth/12)

Frequently asked questions

How do I account for waste or spillage?

Add 5-10% to the calculated volume to cover waste, uneven surfaces, or over-excavation.

Can I use this for a trapezoidal gutter?

This calculator assumes a rectangular cross-section. For trapezoidal shapes, use the average width (top + bottom divided by 2) as the width input.

What if my measurements are in meters?

Convert meters to feet first (1 m = 3.28084 ft) or use a metric version. This calculator works in feet and inches.

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Concrete Volume

0cu ft

Concrete Volume0cu yd
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Estimate for general guidance only — verify important decisions with an appropriate professional.

How it works

Estimates the volume of concrete needed to fill a concrete gutter based on its length, width, and depth.

  1. Convert width and depth from inches to feet by dividing by 12.
  2. Multiply length (ft) by width (ft) and depth (ft) to get volume in cubic feet.
  3. Optionally divide by 27 to get cubic yards.
  4. Round to two decimal places for the final estimate.

Formulas

The math behind this calculator, written out so you can verify the result.

Rectangular Volume

V = L × W × D

Volume equals length times width times depth, all in consistent units.

Example:

Input: L=20 ft, W=1 ft, D=0.5 ft

Calculation: 20 × 1 × 0.5

Result: 10 cu ft

Real-world use cases

Where this calculation shows up in everyday life.

Residential driveway gutters

Estimate concrete for a small gutter along a driveway or walkway.

Example: Typical 20 ft long, 12 in wide, 6 in deep.

Commercial drainage channels

Plan concrete for longer gutter runs on commercial properties.

Example: 50 ft long, 18 in wide, 8 in deep.

DIY landscaping projects

Calculate concrete for decorative or functional garden gutters.

Example: 10 ft long, 10 in wide, 4 in deep.

Tips and common mistakes

Tips

  • Always measure the actual dimensions after excavation, not just the planned ones.
  • Order 10% extra concrete to avoid running short.
  • Use a concrete calculator for irregular shapes by breaking them into rectangles.
  • Check local building codes for minimum gutter sizes.

Common Mistakes to Avoid

  • Forgetting to convert inches to feet before multiplying.
  • Using the outer dimensions instead of the inner cavity dimensions.
  • Not accounting for the slope of the gutter, which can slightly increase volume.

Assumptions and limitations

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.