Tools & categories
Pick a category to see every live calculator. More categories will appear here as we ship them.
Looking for a specific tool? Browse all 201 tools in one page.
Finance
Interest, loans, mortgages, and money growth calculators.
Open category →Personal finance
Rent vs buy, take-home pay, and big personal-money decisions.
Open category →E-commerce
ROAS, margins, fees, and marketplace economics.
Open category →Freelance & agency
Hourly rates, quotes, and consulting economics.
Open category →SaaS & B2B
MRR, churn, LTV, and founder finance models.
Open category →Marketing & ads
Sample size, ad break-even, conversion lift, and email ROI.
Open category →SEO
JSON-LD schema markup and structured data generators.
Open category →Web dev
CSS generators and front-end layout helpers with live preview.
Open category →Data
SQL ER diagrams and browser-side data utilities.
Open category →DevTools
Private formatter and debugging helpers for daily backend work.
Open category →Creator
TikTok, YouTube, and platform monetization comparisons in the browser.
Open category →Logistics
Commodity storage, freight, and supply-chain economics calculators.
Open category →Manufacturing
Concrete, sizing, and construction job-site calculators.
Open category →Legal & employment
Severance and contract estimates (not legal advice).
Open category →HR & compensation
Job offer and total compensation comparison calculators.
Open category →Health & fitness
Macro and nutrition calculators with private browser-side math.
Open category →Real estate
Short-term rental profit, cap rate, and property investment math.
Open category →Privacy & security
Password strength and security helpers with no server uploads.
Open category →Travel
Currency conversion and trip money tools with live rates where needed.
Open category →Productivity
Meeting scheduling and shared-hours planning across time zones.
Open category →Education
Final exam and GPA planning calculators for students.
Open category →Pets
Pet age calculators and care tools for dogs, cats, birds, reptiles, and more.
Open category →Hobbies
3D printing and maker project cost calculators.
Open category →Social media
Pinterest pins and creator assets generated in the browser.
Open category →Math
Statistics, fractions, percentages, and number tools that run entirely in your browser.
Open category →