Math

Instant, private, and free

Right Trapezoid Calculator.

Calculate area and perimeter from parallel bases and perpendicular height.

On-device calculationNo signup

Set your values

Results update as you type.

02 / ANSWER

Base 1

Base 2

Height

Base 1 must be finite.

Results update automatically as you type.

Use Cases

Construction and Architecture

Quickly determine the area of right trapezoidal sections in building plans, such as sloped roofs or land plots, to estimate materials or space.

Example: Calculate the area of a trapezoidal garden bed with bases 5 ft and 8 ft, height 3 ft.

Geometry Homework

Verify your manual calculations for right trapezoid problems in math assignments, ensuring accuracy and understanding.

Example: Check the area and perimeter for a right trapezoid with bases 10 and 14, height 6.

Frequently Asked Questions

What is a right trapezoid?: A right trapezoid is a four-sided figure with one pair of parallel sides (bases) and two right angles. It has two non-parallel sides, one of which is perpendicular to the bases, forming the height.
How do I use this calculator?: Simply enter the lengths of Base 1, Base 2, and the Height (the perpendicular distance between the bases) in the provided fields. The calculator will instantly compute the area and perimeter of the right trapezoid.
What units should I use?: You can use any consistent unit of length (e.g., inches, feet, centimeters, meters). The area will be in square units, and the perimeter in the same linear units you entered.

Tips & Common Mistakes

Tips

Ensure that Base 1 and Base 2 are the parallel sides of the trapezoid.
The height must be the perpendicular distance between the bases, not the length of a slanted side.
Use the same unit for all inputs to get consistent results for area and perimeter.
Double-check your inputs for positive numbers; negative or zero values are not valid for lengths.

Common Mistakes to Avoid

Entering the slanted side length as the height instead of the perpendicular distance.
Mixing units (e.g., feet and inches) without converting to a single unit first.
Assuming the calculator computes the area of any trapezoid, but it is specifically for right trapezoids where one side is perpendicular to the bases.

Last updated: August 13, 2026

Use Cases

Construction and Architecture

Quickly determine the area of right trapezoidal sections in building plans, such as sloped roofs or land plots, to estimate materials or space.

Example: Calculate the area of a trapezoidal garden bed with bases 5 ft and 8 ft, height 3 ft.

Geometry Homework

Verify your manual calculations for right trapezoid problems in math assignments, ensuring accuracy and understanding.

Example: Check the area and perimeter for a right trapezoid with bases 10 and 14, height 6.

Frequently Asked Questions

What is a right trapezoid?

A right trapezoid is a four-sided figure with one pair of parallel sides (bases) and two right angles. It has two non-parallel sides, one of which is perpendicular to the bases, forming the height.

How do I use this calculator?

Simply enter the lengths of Base 1, Base 2, and the Height (the perpendicular distance between the bases) in the provided fields. The calculator will instantly compute the area and perimeter of the right trapezoid.

What units should I use?

You can use any consistent unit of length (e.g., inches, feet, centimeters, meters). The area will be in square units, and the perimeter in the same linear units you entered.

Tips & Common Mistakes

Tips

Ensure that Base 1 and Base 2 are the parallel sides of the trapezoid.
The height must be the perpendicular distance between the bases, not the length of a slanted side.
Use the same unit for all inputs to get consistent results for area and perimeter.
Double-check your inputs for positive numbers; negative or zero values are not valid for lengths.

Common Mistakes to Avoid

Entering the slanted side length as the height instead of the perpendicular distance.
Mixing units (e.g., feet and inches) without converting to a single unit first.
Assuming the calculator computes the area of any trapezoid, but it is specifically for right trapezoids where one side is perpendicular to the bases.

Use Cases

Construction and Architecture

Quickly determine the area of right trapezoidal sections in building plans, such as sloped roofs or land plots, to estimate materials or space.

Example: Calculate the area of a trapezoidal garden bed with bases 5 ft and 8 ft, height 3 ft.

Geometry Homework

Verify your manual calculations for right trapezoid problems in math assignments, ensuring accuracy and understanding.

Example: Check the area and perimeter for a right trapezoid with bases 10 and 14, height 6.

Frequently Asked Questions

What is a right trapezoid?

A right trapezoid is a four-sided figure with one pair of parallel sides (bases) and two right angles. It has two non-parallel sides, one of which is perpendicular to the bases, forming the height.

How do I use this calculator?

What units should I use?

You can use any consistent unit of length (e.g., inches, feet, centimeters, meters). The area will be in square units, and the perimeter in the same linear units you entered.

Tips & Common Mistakes

Tips

Ensure that Base 1 and Base 2 are the parallel sides of the trapezoid.
The height must be the perpendicular distance between the bases, not the length of a slanted side.
Use the same unit for all inputs to get consistent results for area and perimeter.
Double-check your inputs for positive numbers; negative or zero values are not valid for lengths.

Common Mistakes to Avoid

Entering the slanted side length as the height instead of the perpendicular distance.
Mixing units (e.g., feet and inches) without converting to a single unit first.
Assuming the calculator computes the area of any trapezoid, but it is specifically for right trapezoids where one side is perpendicular to the bases.