How to Calculate Square Footage of a Room

By

 

Calculate square footage for a rectangular room, floor, or other flat area. Add non-overlapping rectangular sections for an L-shaped space and see the total in square feet, square meters, and square yards.

Calculate your area

Measure length and width for each rectangle. For a room in an L shape, split it into two rectangles that do not overlap. Completely empty sections are ignored. This tool measures area, not volume.

This calculator needs JavaScript. If this message stays visible, the calculator has not loaded.

Up to 10 sections. Inches are optional and must be less than 12. You can instead enter decimal feet with inches left blank. Changing systems clears all dimensions.

Your entries are calculated in this browser. This tool does not save or send them. Google Blogger may separately provide its own platform services and cookies.

How to calculate square feet

Area in square feet = length in feet x width in feet

A rectangular room 12 feet long and 10 feet wide has an area of 120 square feet. Both dimensions must use compatible units.

For measurement steps and worked examples, read our guide to calculating square footage of a room.

Feet and inches example

Convert inches to a fraction of a foot by dividing by 12. A length of 12 feet 6 inches equals 12.5 feet. At a width of 10 feet, the area is 125 square feet. In the form, enter 12 in Feet and 6 in Inches, or 12.5 in Feet and leave Inches blank. Do not enter both 12.5 feet and 6 inches for the same measurement.

Figure out square footage of an L-shaped room

Divide the room into rectangles that do not overlap. Calculate each area, then add them. A 12-by-10-foot section and a separate 6-by-4-foot section total 120 + 24 = 144 square feet. Do not include the same corner in both rectangles.

Square feet, square meters, and square yards

One square meter equals approximately 10.7639 square feet. One square yard equals 9 square feet. For example, 144 square feet equals 16 square yards and approximately 13.378 square meters.

Frequently asked questions

Can I convert feet directly to square feet?

A length alone is not enough to calculate area. You need another measurement, such as width, and the shape of the space. Feet measure length; square feet measure area.

Can I use this for a floor or a wall?

Yes, for a rectangle. For a wall, treat height as one dimension and width as the other. The calculator does not automatically subtract doors or windows, account for sloped surfaces, or determine how a flooring or wallpaper product must be cut.

Does this calculate how much material to buy?

It calculates geometric area only. Product coverage, installation pattern, cutting losses, and package sizes can change purchasing quantities. Confirm those requirements with the supplier or installer.

Does this determine official living area?

No. This is a general measurement aid. Real-estate, appraisal, permit, and rental measurements may use specific rules about walls, stairs, ceiling heights, and excluded spaces.

What inputs are supported?

Up to 10 rectangles, with positive total length and width for every completed section. Feet or meters can be up to 10,000, with optional inches from 0 to less than 12 in US mode. Each field accepts up to four decimal places, using a decimal point or comma without thousands separators. Entirely empty sections are ignored; incomplete sections must be completed or removed.

Why are dimensions cleared when I change units?

So a number entered in feet is not silently reused as meters. Enter your measurements again in the selected system.

Related landscaping calculators

Area needs a depth to become volume. For an outdoor project, use our Gravel Calculator or Mulch Calculator to estimate a rectangular layer.

HandyMetric provides general calculation aids, not certified surveying, appraisal, design, or installation services. Verify measurements and project requirements before buying materials.

Comments

Post a Comment

Popular posts from this blog

How to Calculate Mulch Needed: Cubic Yards and Bags

By
Estimate how much mulch you need for a rectangular garden bed. Enter length, width, and planned depth to calculate volume, then use the volume printed on your bag to estimate how many whole bags to buy. Calculate mulch volume and bags Use a uniform depth appropriate for your project. Bag size is volume, not weight. Check the package label; not all bags contain the same amount. This calculator needs JavaScript. If this message stays visible, the calculator has not loaded. Measurement system US: feet and inches Metric: meters and centimeters Length (feet) Width (feet) Depth (inches) Volume per bag Bag size Bag volume unit Cubic feet Liters Calculate mulch and bags Clear all Estimated bags to buy Volume in cubic yards Volume in cubic feet Volume in cubic meters Geometric volume only. No extra allowance for settling, uneven ground, or handling losses. Volumes display up to four decimals; values below 0.0001 are labeled accordingly. Confirm your material and ordering quantity wi...
Read more

How to Calculate Billable Hours: Minutes, Rates and Billing Increments

By
  Calculating billable hours means adding the time eligible under your agreement, converting that time to hours, and applying the agreed hourly rate. Keep the actual time separate from any permitted billing increment rounding. Use the Billable Hours Calculator to add durations and estimate a charge with exact-minute billing or an agreed increment. How to calculate billable hours Record the actual duration of each task. Confirm which time is eligible for billing under your agreement. Apply the agreed rounding rule, if any. Divide billable minutes by 60. Multiply the result by the hourly rate. Charge = billable minutes / 60 x hourly rate. Example: adding time from two tasks Suppose eligible work takes 1 hour 20 minutes and 45 minutes. The total is 125 minutes, or 2 hours 5 minutes. At $90 per hour with exact-minute billing, the charge is 125 / 60 x $90 = $187.50 . Do not multiply a rounded decimal display when more precision is available. Keeping the total in minutes avoids an int...
Read more

How to Calculate Macros: Calories, Percentages and Grams

By
  A macro calculator converts between calories, percentages and grams of protein, carbohydrates and fat. Before calculating, decide which quantities you already know. A calorie total with a chosen energy split answers a different question from a list of macro gram amounts. Neither calculation establishes the food intake or nutrient balance that is appropriate for an individual. The Macro Calculator: Calories, Protein, Carbs & Fat supports both directions. It uses general energy factors of 4 kcal per gram of protein, 4 kcal per gram of carbohydrate and 9 kcal per gram of fat. Use one consistent period, such as a meal or a day, throughout your entries. Start with shares of calories In percentage mode, enter your chosen calorie total and the percentage of that energy assigned to each macro. Percentages refer to calories, not the weight of the food or the percentage of grams. The protein, carbohydrate and fat shares must add up to exactly 100%. For each macro, multiply total c...
Read more