Free calculators, tools, and data
for every niche.
74 niche sites, 11,917 pages total. Pick a topic — each niche gets its own subdomain with calculators, tools, lookups, and practice drills.
Featured niches
Hand-picked sites that are ready to ship.
Running
Pace, race, and training calculators for runners.
Finance
Loans, mortgages, investing, taxes, and money math.
Insurance
Life, auto, home, and health insurance calculators.
Loans
Student, auto, personal, and mortgage loans.
Credit Cards
APR, rewards, balance transfer, payoff.
Cybersecurity
Password strength, breach cost, MFA impact, encryption overhead.
Hosting
CDN, storage, bandwidth, total cost of ownership.
Life Insurance
Term, whole, universal — coverage and cost.
High CPM — launch first
High-CPM verticals (insurance, finance, legal) — the biggest ad revenue per visit.
Running
Pace, race, and training calculators for runners.
Finance
Loans, mortgages, investing, taxes, and money math.
Insurance
Life, auto, home, and health insurance calculators.
Loans
Student, auto, personal, and mortgage loans.
Credit Cards
APR, rewards, balance transfer, payoff.
Cybersecurity
Password strength, breach cost, MFA impact, encryption overhead.
Hosting
CDN, storage, bandwidth, total cost of ownership.
Life Insurance
Term, whole, universal — coverage and cost.
Auto Insurance
Premiums, deductibles, coverage limits.
Home Insurance
Dwelling, personal property, liability.
Health Insurance
Premiums, deductibles, out-of-pocket max.
Business Legal
LLC, corp, contracts, IP.
Personal Legal
Estate, family, immigration.
Real Estate
Mortgages, ROI, rent vs buy, closing costs.
Tax
Federal, state, payroll, capital gains, deductions.
Business
Invoicing, payroll, depreciation, valuation, cash flow.
Specialized — launch second
Specialized professions (real-estate, vehicles, photography) — strong ad revenue.
Construction
Board feet, concrete, paint, framing, fasteners.
Tech & Dev
Developer calculators, tools, and reference tables.
Vehicles
MPG, fuel cost, loans, gear ratio, oil change, fuses.
Electronics
Ohm, voltage divider, RC, frequency, ampacity, fuses.
Home & Garden
Paint, tile, flooring, fence, mulch, fertilizer.
Trades & hobbies — launch third
Trades, hobbies, and consumer topics (construction, fitness, food, travel) — broad traffic.
Photography
DoF, exposure, focal length, sensors, lenses.
HVAC
BTU, CFM, tonnage, ducts, SEER, refrigerant.
Plumbing
Pipe flow, fixtures, drains, water heaters, PEX.
Woodworking
Board feet, cut list, wood movement, species, screws.
Metalworking
Bend, kerf, cut time, weight, sheet metal gauge.
Health & Fitness
BMI, BMR, TDEE, body fat, calories, macros.
Education & creative — launch fourth
Education, creative, and reference (tech, music, education, language) — engagement and depth.
RPG & Tabletop
NPCs, dungeons, encounters, loot, items, spells.
Education & Test Prep
SAT, GRE, vocab, language, music theory, typing.
Music Theory
BPM, intervals, scales, chords, key signatures.
Language Learning
Spanish, French, German, Italian, Japanese basics.
Food & Cooking
Recipes, baking, nutrition, conversions, substitutions.
Investing
ROI, IRR, dividend yield, compound interest.
Crypto
Mining, gas, staking, ROI, conversion, supply.
Retirement
401k, IRA, Roth, 403b, pension, social security.
College
GPA, tuition, loans, aid, ROI, scholarships.
Small Business
Invoicing, payroll, profit, taxes, break-even.
Freelance
Rates, invoicing, taxes, expenses, contracts.
Long tail — launch as content allows
Long-tail niches (art, history, science, sub-niches) — launched as content allows.
Kids & Parenting
BMI, growth, sleep, screen time, milestones.
Pregnancy
Due date, week-by-week, weight, kicks, contractions.
Fashion
Sizes, fabric yardage, seam allowance.
DIY
Paint, tile, drywall, deck, simple home projects.
Productivity
Pomodoro, kanban, OKR, sprints, capacity.
Math & Science
Algebra, geometry, trig, stats, probability.
Writing
Word count, readability, citations, grammar.
Weather
Heat index, wind chill, dew point, UV, sunrise.
Pets
Age, food, calories, medication, breeds.
Travel
Currency, time zones, jet lag, fuel, packing.
Cycling
Power, cadence, gear ratio, tire pressure.
Gaming
Odds, drops, builds, game economy, performance.
Boating
Speed, fuel, hull speed, navigation, anchoring.
Landscaping
Mulch, soil, fertilizer, slope, drainage.
Solar
Panel sizing, battery, payback, ROI, irradiance.
Gardening
Soil, seeds, fertilizer, planting calendar, zones.
Fitness & Strength
1RM, plate math, TDEE, training zones.
Automotive
MPG, oil, battery, fuses, VIN, gear ratio.
Electrical Trade
Wire, ampacity, voltage drop, conduit fill, boxes.
Machining
Speeds, feeds, tolerances, threading, G-code.
3D Printing
Print time, filament, infill, slicer, resin.
General
Catch-all for uncategorized utilities.
Science
Physics, chemistry, biology formulas and constants.
Shipping
Weight, volume, freight class, parcel math.
Physics
Kinematics, energy, force, electricity, waves.
Design
Color, typography, layout, accessibility.
Art
Color mixing, drawing, composition.
Data
CSV, JSON, SQL, data analysis.
Security
Crypto, hashing, password, secret generation.
SEO
Meta tags, robots, sitemap, schema.org.
Legal
License, terms, privacy templates.
DevOps
Docker, nginx, CI, deployment.
Career
Resume, interview, salary, negotiation.
History
Dates, events, presidents, timelines.
Marketing
Copy, headlines, conversion, ROI.
Graduate School
GRE, grad-school prep, applications.