Square Footage Calculator
Calculate total square footage for multiple rooms. Estimate renovation cost per square foot.
Total Square Footage
468 sqft
Room-by-Room Breakdown
| Living Room (20 × 15 ft) | 300 sqft |
| Bedroom (14 × 12 ft) | 168 sqft |
| Total | 468 sqft |
Use the Square Footage Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
Our Square Footage Calculator helps you accurately determine the total area of multiple rooms within your property. This is crucial for precise material ordering, labor estimations, and budgeting for any renovation project, especially as construction costs continue to fluctuate in 2026. Understanding your total square footage is the first step towards a successful and financially sound home improvement.
The calculator sums the individual square footage of each room you input. For rectangular rooms, it multiplies length by width. For irregular shapes, it breaks them down into simpler geometric figures (e.g., rectangles and triangles) and sums their individual areas. The estimated renovation cost is then derived by multiplying the total square footage by a user-defined cost per square foot.
Always measure twice to avoid costly errors in material over-ordering or under-ordering. Don't forget to account for non-rectangular spaces like bay windows or alcoves, and remember that 'cost per square foot' is an average; actual costs can vary significantly based on material quality, labor rates, and the complexity of the renovation. Be sure to factor in a contingency budget of 10-20% for unexpected expenses.
Example: Renovating a Living Room and Kitchen in 2026
- 1 You're planning to renovate your living room and kitchen. The living room measures 18 feet by 15 feet, and the kitchen is 12 feet by 10 feet. You've obtained quotes indicating an average renovation cost of $75 per square foot in your area for the scope of work you're considering.
- 2 Living Room: 18 ft * 15 ft = 270 sq ft. Kitchen: 12 ft * 10 ft = 120 sq ft. Total Square Footage: 270 sq ft + 120 sq ft = 390 sq ft. Estimated Renovation Cost: 390 sq ft * $75/sq ft = $29,250.
- 3 The total square footage for your living room and kitchen renovation is 390 square feet. Based on an average cost of $75 per square foot, your estimated renovation cost is $29,250.
- 4 This estimate provides a solid starting point for your budget. Remember to get detailed quotes from contractors that break down costs for materials, labor, and any specialized services to refine this figure further. Also, consider that material prices, such as lumber and flooring, have seen an average increase of 4-6% in early 2026, which can impact your final cost.
Source: HomeAdvisor · Last updated: April 2026
Frequently Asked Questions
How do I calculate the square footage of a room?
How much does renovation cost per square foot in 2026?
Does a garage count in square footage?
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