Home & Construction Calculators
Plan construction and home projects with real numbers: building costs use Brazil’s official CUB index, materials follow SINAPI compositions and manufacturer datasheets, and US DIY tools follow IRC code and Quikrete specs. Every calculator shows its math so you can negotiate quotes with confidence.
Brazil House Construction Cost Calculator (2026)
Enter the built area and finish standard to estimate what it costs to build a house in Brazil in 2026. The calculator uses the CUB — Brazil’s official construction cost index per square meter — for the July 2026 reference month, and shows both ends of the budget: the strict CUB figure and a realistic estimate that adds the 20–40% of items the index deliberately leaves out.
Rent vs Buy Calculator (Brazil, 2026)
Buying property in Brazil looks tempting until you price the opportunity cost of the cash. This calculator runs both paths month by month: the buyer pays a down payment plus transfer taxes, finances the rest with a 30-year fixed-payment mortgage and watches the property appreciate; the renter invests exactly the same upfront cash and contributes the monthly gap between mortgage payment and rent. At the end of your horizon you see both net worths side by side, with every assumption disclosed.
Brazil Rent Increase Calculator (2026)
Brazilian leases are adjusted once a year by an inflation index written into the contract. This calculator applies the latest official figures available: IGP-M at 2.76% and IPCA at 4.44%, both accumulated over the 12 months through July 2026 — the numbers that apply to leases renewing in August 2026.
Brazil Roof Tile Calculator (2026)
Enter the area your roof covers, its slope in percent and the tile type to find out how many pieces to buy. The calculator corrects the flat footprint by the slope factor — the mistake that leaves most self-builders short of tiles — applies manufacturer datasheet yields, and adds a waste margin for breakage and cutting.
Brazil Brick Calculator: How Many Bricks per Square Meter
Enter the net wall area and the format you plan to use, and this calculator returns how many bricks or blocks to order — including a breakage allowance and an estimate of laying mortar. Yields come from SINAPI, the official Brazilian construction cost database maintained by Caixa Econômica Federal and IBGE.
Brazil Concrete Mix Calculator: Cement, Sand and Gravel
Enter a volume — or an area and a thickness — pick what the concrete is for, and get the number of 50 kg cement bags, the cubic meters of sand and gravel, and the liters of water the batch requires. Mix designs come from the official SINAPI compositions for site-mixed concrete, and the result already includes a 5% waste allowance.
Brazil Paint Calculator: Liters and Cans Needed
Buying too much paint leaves money sitting in the garage; buying too little means a second trip and the risk of a slightly different tint batch. Enter the wall area — or just the room dimensions — and this calculator returns the liters you need plus the cheapest combination of 18-liter cans and 3.6 L tins, using coverage rates taken from Brazilian manufacturer datasheets.
Brazil Tile and Flooring Calculator: Boxes, Mortar and Grout
Getting the tile quantity wrong is one of the most expensive mistakes in a renovation. Run short and you go back to the shop, risking a different production batch with a visibly different shade; overbuy and you are stuck with boxes no retailer takes back once opened. Enter the room area, the layout type and the square meters per box printed on the packaging, and this calculator applies the correct waste allowance and estimates adhesive mortar and grout.
Brazil BTU Calculator: What Size Air Conditioner Do I Need?
Buying the wrong air conditioner costs you twice — once at the store and again on every electricity bill. This calculator applies the sizing rule used by installers and manufacturers in Brazil: 600 BTU/h per m² for a shaded room, 800 BTU/h per m² when direct sun hits most of the day, plus 600 BTU for each additional person and each heat-generating appliance. It then rounds the result up to a capacity you can actually buy and estimates what it will add to your bill.
Brazil Electricity Cost Calculator: What Each Appliance Costs to Run
Finding out which appliance is driving your electricity bill takes three numbers: its power rating in watts, how long it runs, and the price of a kilowatt-hour. This calculator turns those into monthly kWh and cost per month, per year and per hour of use. It ships with the Brazilian residential average rate for September 2026 — R$0.95/kWh, taxes and the current yellow tariff flag included — plus presets for the appliances that dominate a household bill.
Brazil Staircase Calculator: Steps, Riser and Run
A badly proportioned staircase is a daily annoyance and a permanent fall risk. Enter the floor-to-floor height, your target riser and the tread depth: this calculator rounds to a whole number of steps, returns the actual riser that will be built, checks the Blondel comfort formula and shows how much floor length the staircase will take.
Fence Post Concrete Calculator
Enter your post size, hole depth and hole diameter and this calculator tells you exactly how many bags of concrete each fence post needs — plus the total bag count and how many pounds you will be loading into the truck. The math uses the real dressed size of US lumber (a 4x4 is 3.5" wide, not 4") and the published bag yields from Quikrete and Sakrete, so the number you get is the number that actually fills the hole.
Stair Stringer Calculator
Measure the total rise from the ground to the top of your deck, type it in, and this calculator lays out the whole stair: how many risers, how tall each one actually is, how many treads, how far the stairs project from the deck, and how long a 2x12 you need to cut the stringers from. Everything is checked against the IRC limits of a 7 3/4" maximum riser and a 10" minimum tread.
Brazil Solar Panel Calculator: System Size, Cost and Payback
This calculator turns a Brazilian electricity bill into a solar system: array size in kWp, number of panels, installed cost, monthly savings and payback in years. It applies the 2026 rules of Law 14,300 — under which 60% of the Fio B grid component is charged on offset energy — and defaults to the September 2026 national residential rate of R$0.95/kWh.
Brazil Pool Volume Calculator: Liters, Gallons, Chlorine and Filtration
Nearly every pool problem starts with not knowing the volume, because every chemical label doses per 1,000 liters. Three tape-measure readings fix that. This calculator handles rectangular, round and oval pools, returns the volume in cubic meters and liters, and converts it into the numbers that matter weekly: maintenance chlorine, shock dose and how many hours a day the pump should run.
Brazil Lease Termination Penalty Calculator
Breaking a lease early in Brazil is a right, not a breach — but it has a price. Article 4 of the Tenancy Law lets the tenant hand the property back at any time, paying the agreed penalty reduced in proportion to the part of the term already served. This calculator applies that formula, so you can see the difference between the full penalty landlords often quote and the amount the law actually allows.
Also available in Portuguese: Calculadoras de Construção e Casa