Alternatives to SolveIndex
50 alternatives to SolveIndex in Calculators. Ones the founder approved come first; the rest are listings in the same category.
Calconic
No-code calculator builder for websites
- Same category
- Established
- Lithuania
Disk Prices
Compare HDD and SSD prices with full specifications and price per terabyte in the US
- Same category
- United States
How Much Is It Worth
Snap a photo to check what something is worth based on current listings
- Same category
TrustTheCalcs
Construction calculators that show their math
- Same category
CargoFormula
Free shipping calculators and load planning tools for freight, cargo, containers, pallets and packaging
- Same category
BuildWire Calc
Offline calculators for electricians, builders and HVAC technicians
- Same category
- United States
Toolsped
Free calculators, converters, and everyday tools for math, money, home projects, health, and files
- Same category
- United States
TDEE Steps
Free Mifflin-St Jeor calculator that shows every step of the equation
- Same category
Miryori
Free online calculators for finance, health, salary, loans, and everyday decisions
- Same category
-
Calculator Heaven
Quick, free converters and calculators for everyday use with no sign-up required
- Same category
- United States
CostCal Pro
Enter every cost, pick the profit you want, get the exact sales price
- Same category
CallsIQ
Free Erlang C calculator for contact center staffing and service level planning
- Same category
- Spain
-
RecastMate
Free mortgage recast calculator and educational guides for homeowners
- Same category
- United States
Snow Day Calculator
Predict school closures and delays with live weather for any US or Canadian location
- Same category
- United States
ToolExo
Clear, privacy-first online tools
- Same category
- United States
Square Footage Calculator
Measure rooms and plan DIY flooring projects with feet, inches and metric units
- Same category
RulerNest
Free on-screen ruler and measuring tools with calculators
- Same category
- Startup
- United Arab Emirates
CalcFence
Free fence calculators for posts, rails, pickets, panels, concrete and installed cost estimates
- Same category
- United States
Should I Grade It?
Free Pokémon card grade checker
- Same category
CalculateBraSize
- Same category
Coast FIRE Planner
Find the month you can stop saving for retirement
- Same category
- Canada
Yuanzi Zhiyi
Free Bazi Chart Calculator with True Solar Time and AI Interpretation
- Same category
firenum™
Free FIRE financial planner with Monte Carlo simulation and historical backtesting
- Same category
- Established
WorthCay
Free Coast FIRE calculator to track your progress toward financial independence
- Same category
Calxo AI
Free online calculators and unit converters for finance, health, and everyday calculations
- Same category
- Established
Handy Money Tools
Free UK money calculators for tax, mortgages, loans, savings and everyday maths
- Same category
- United Kingdom
UtilHub UK
The useful corner of the internet
- Same category
- United Kingdom
The Concrete Calculator
Free concrete slab cost estimator with material, labor and site prep breakdowns
- Same category
Ohmlark
Electronics calculators for makers
- Same category
EZGrader
Free grading calculator and printable chart for teachers
- Same category
Speedometer.tools
Free online GPS speedometer for your phone
- Same category
Concrete Price Calculator
Estimate concrete quantity and installed price for U.S. projects
- Same category
- United States
Tools Berry
Free online calculators and tools that run entirely in your browser
- Same category
CrunchMyPay
Free pay and money calculators with 2026 tax tables
- Same category
- United States
BaZi Calculator
Free Four Pillars of Destiny chart calculator with true solar time
- Same category
NZ PAYE Calculator 2026/27
Free NZ PAYE calculator for take-home pay, tax, ACC levy, KiwiSaver and student loan deductions
- Same category
- New Zealand
calc84online
Free online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep
- Same category
Check My Ring Size
Free ring size checker with three calibration methods and six regional sizing systems
- Same category
- Startup
PaycheckZip.com
2026 paycheck estimates with line-by-line tax breakdowns for every state
- Same category
-
EveryCalc
Free online calculators for money, military, and school decisions that run entirely in your browser
- Same category
VoltReflex
Free online reaction time test that measures your reflex speed in milliseconds
- Same category
- United States
-
CognitiveWP
Free B2B business calculators and planning tools for US businesses
- Same category
- United States
AspectCalc
Free aspect ratio calculator and converter for images, videos and screens
- Same category
How Long How Many Days
Free live countdown timer to any time of day or date
- Same category
R6 Sensitivity Calculator
Free PC hip-fire sensitivity converter between CS2 and Rainbow Six Siege
- Same category
TidyBoss
Free home maintenance tools and guides for homeowners
- Same category
- Startup
- Canada
Where Should I Sell?
Compare fees across 8 marketplaces to see what you'll actually keep when you sell
- Same category
- United States
Metriova
Free marketplace fee calculators for Etsy, eBay and Amazon FBA
- Same category
- Startup
AstroCalcolo
Ascendant calculator for Italy and the world with IANA timezone conversion and historical rules
- Same category
- Italy
TDEE Calculator
Free online calculator to estimate your Total Daily Energy Expenditure and daily calorie needs
- Same category