What do you need to figure out?
Calculate materials, compare costs, troubleshoot expenses, and plan everyday projects with practical tools that get to the answer.
94 practical tools. Free to use.
Featured Tools
- Concrete CalculatorEstimate concrete volume, bag quantities, and material cost for slabs, post holes, and footings.
- Mulch CalculatorEstimate mulch volume, bags, and cost for your garden beds.
- High Electric Bill DetectiveEstimate how much new or changed electrical loads could explain a higher electric bill.
- Moving Box CalculatorPlan how many moving boxes to buy and how much packing tape you need.
- Generator Appliance Load BuilderAdd household appliances to estimate the running and starting watts your generator needs.
- Mortgage CalculatorEstimate mortgage payments and total interest, including taxes, insurance, and PMI.
What are you trying to do?
Plan a home project
Cut my utility bills
Work on my yard
Figure out my car
Prepare for an outage
Plan a move
Work with numbers & conversions
Manage my money
Recently Added
- Visual Tire Wear TroubleshooterIdentify uneven tire wear visually, screen for warning signs and prepare practical questions for a tire professional.
- Circuit Breaker Panel Directory & Label MakerCreate an editable circuit breaker panel directory, save it locally and print compact directories or Avery 5160 labels.
- Gravel Bags vs. Bulk Delivery Cost ComparatorCompare whole bags of gravel with bulk delivery, including delivery fees, supplier minimums and order increments.
- Home Battery Backup Sizing & Runtime CalculatorChoose essential appliances to estimate battery size, backup runtime and the output needed for a household outage.
- Health Insurance Plan Cost ComparatorCompare two health plans using annual premiums, modeled in-network medical costs and separate employer HSA funding.
- Mortgage Escrow Shortage & Payment Increase CalculatorExplain a mortgage payment increase using your escrow analysis.
Useful tools. No nonsense.
RockUtility builds practical online calculators and planning tools for everyday problems, from home improvement and materials to utility bills, cars, moving, and money. We show assumptions where they matter, test known answers, and keep the tools straightforward to use.