Accurate, fast, and free calculators for rent, trucking, legal, construction, and payroll
Oregon Calc is a free suite of online calculators built specifically for residents of Oregon and Washington, as well as truckers, contractors, and small business owners nationwide. Whether you are moving into a new apartment and need to figure out your pro-rated rent, launching an LLC and want to know the exact state filing fees, or driving cross-country and tracking your fuel cost per mile, we have a tool designed to give you a fast, accurate answer.
Every calculator on this site is built with transparency in mind. We show you the exact formulas, data sources, and step-by-step breakdowns behind every result. Our tax calculators use 2026 federal and state brackets so your take-home pay estimates reflect the latest rates. Our legal tools reference current Oregon Revised Statutes so you can verify the rules yourself. And our construction calculators factor in real-world waste percentages so your concrete and material estimates match what you will actually need on the job site.
Oregon Calc was created by Weird City Enterprises LLC, based in Gresham, Oregon. We built these tools because we needed them ourselves and could not find reliable, ad-light alternatives. Every tool is free to use, mobile-friendly, and requires no sign-up. We earn revenue through ads and affiliate links, but these never influence our calculations or recommendations. If a number is wrong, we want to know — accuracy is our top priority.
Explore the calculators below and bookmark the ones you use most. We add new tools regularly based on user requests, so check back often or reach out through our contact page if there is a calculator you would like to see next.
Calculate your partial month rent and late fees for Oregon rentals.
Use Calculator →Calculate your partial month rent for Washington state rentals.
Use Calculator →Estimate fuel expenses, cost per mile, and load profitability.
Use Calculator →Find filing fees, eligibility, and check your case readiness.
Use Calculator →Calculate cubic yards, bags needed, and material costs with waste factor.
Use Calculator →Estimate your net pay after federal, state, and payroll taxes.
Use Calculator →Zero state income tax — calculate your WA net pay after federal taxes, FICA, and WA Cares.
Use Calculator →Estimate your quarterly self-employment tax payments for federal and state.
Use Calculator →Calculate your IFTA fuel tax credits and amounts owed by jurisdiction.
Use Calculator →Compare LLC filing fees, annual report costs, and formation requirements across all 50 states.
Use Calculator →Transparent Formulas: Every calculator on Oregon Calc shows you the exact formula and step-by-step breakdown used to produce your result. We never hide the math. You can verify every number yourself using the sources we cite.
Current Data: Our tax calculators use 2026 federal and state tax brackets. Legal tools reference current Oregon and Washington statutes. We update our data sources at the start of each tax year and whenever significant legislative changes take effect.
No Sign-Up Required: All tools are 100% free, run entirely in your browser, and never require an account or email address. Your data stays on your device.