The Tools Hub: free calculators that do the math honestly
Five small tools, no sign-up, no email gate. Every number is calculated in your browser from the figures you type — change any input and the result updates instantly. Where a tool estimates (like AdSense), it says so and shows a range, not a promise.
50/30/20 Budget Calculator
Our original calculator: enter your monthly take-home pay and it splits it the classic way — 50% needs, 30% wants, 20% savings and debt payoff. It lives on the homepage, where it has always been; open it there and it is ready in ten seconds.
Open the 50/30/20 calculator →Related guide: The 50/30/20 Budget, Explained With Real US Numbers
Emergency Fund Calculator
An emergency fund is a ladder, not one magic number. The first $500 keeps a bad week from becoming credit-card debt, $1,000 covers most real surprises, and after that the honest target is months of your essential expenses. Enter your numbers and see how long each rung actually takes at your pace.
Rent, bills, groceries, transport, minimum payments — the essentials only, not your full spending.
Related guides: How to Build a $500 Starter Emergency Fund · Emergency Fund 101: Your First $1,000, Then 3 Months
AdSense Earnings Estimator
AdSense pays per thousand pageviews — that rate is called RPM, and it depends mostly on your topic and where your readers live. Pick the preset closest to your niche, or type in an RPM you have seen reported for your site, and treat the answer as a planning range, never a prediction.
Monthly earnings = pageviews ÷ 1,000 × RPM. We show the mid estimate and a realistic range around it.
Educational estimate only. Real RPM varies widely by niche, reader country, season, and advertiser demand — your actual earnings may be far lower or higher. This is not a promise or guarantee of earnings.
Related guide: AdSense Explained: How Websites Get Paid, the $100 Threshold, and Why RPM Differs
Debt Payoff Calculator
Card math is unforgiving: interest is charged every single month on whatever you still owe, so the size of your payment matters more than the size of the balance. Enter a balance, its APR, and your monthly payment to see your debt-free date in months — and what the interest in between really costs you.
Assumes the same payment every month and no new charges on the card.
Related guides: The 50/30/20 Budget, Explained With Real US Numbers · Your First Budget When Money Is Tight: The 7-Day Reset
Side Hustle Startup Cost Calculator
Most side hustles genuinely can start for $0 — but “free to start” and “costs nothing ever” are different claims. Tick only the items your idea actually needs, edit any price to match a real quote you have seen, and you will get the true total — plus how many weeks of saving stand between you and starting.
Related guides: How Much Does It Really Cost to Start a Side Hustle? The $0, $50, and $100 Plans · Your First $100 Online: 5 Realistic Paths Ranked by Speed