Field notes for everyday work
Small tools.
Clearer next moves.
Practical calculators and text helpers that run in your browser—built for the gap between “I need to know” and getting on with it.
20 useful tools, no sign-in required
Made for the useful moments.
How Utility Hub works
A small reference desk, not a pile of buttons.
Utility Hub is maintained as an independent online reference for everyday calculations and text tasks. Each tool is checked against ordinary inputs, explains the method behind its result, and names the situations where a human or an official source should take over.
The tool index
Find the next useful thing.
Every tool includes a clear method, common uses, and a note on where an estimate needs a human check.
Hourly Rate
Price your time with a rate that covers income goals, expenses, tax, and realistic billable hours.
Margin & %
Work out percentage change, markup, profit margin, and profit from two clear starting values.
Loan Calculator
Estimate monthly loan payments, total interest, and a compact amortization schedule.
Payment Fee Calculator
Estimate payment processing fees and the net amount that reaches your account across common pricing presets.
Subscription Burn Rate
Turn a pile of monthly subscriptions into a clear monthly burn rate and annual software cost.
Video RPM Estimator
Estimate advertising revenue from views, RPM assumptions, publishing cadence, and a chosen content niche.
ROI & Break-Even
Compare investment cost with return, calculate ROI, and estimate how many sales or months it takes to break even.
Slug Generator
Turn a page title or phrase into a clean, lowercase, hyphen-separated URL slug with a one-click copy action.
Meta Preview
Draft a page title, description, canonical URL, and image, then review Google, social, and X-style snippets in real time.
JSON Formatter
Validate JSON locally, format it for review, minify it for transport, and inspect a readable expandable tree.
Markdown to HTML
Write Markdown, inspect a clean HTML preview, and copy the generated markup without leaving your browser.
Meeting Cost
Estimate the salary cost of a meeting from attendee count, average pay, duration, and employer overhead.
Aspect Ratio Scaler
Keep image or video proportions intact while calculating a missing width, height, ratio, or standard preset dimension.
Discount Calculator
Calculate stacked discounts, sales tax, total savings, and a final checkout price from an original amount.
Habit Timeline
Map a habit frequency and target count to a projected completion date, streak milestones, and weekly pace.
The desk drawer
Popular when the stakes feel a little higher.
Pricing work, comparing a loan, or finding a fair meeting time? These three get the most repeat visits.
Fresh from the index
Tools for busy calendars and cleaner copy.
New additions stick to the same standard: make a useful task less fiddly, and be upfront about the assumptions.
From the editorial desk