Embeddable Calculators for Modern Teams
52 rigorously tested financial, medical, health, climate, and business calculators. No iframe — styles can't leak in or out. Integrate world-class tools into your product in seconds.
Live Integration Sandbox
data-theme="light"
data-api-key="your_key"></div>
The Universal Registry
A comprehensive suite of 52 specialized calculators, ready to deploy in seconds.
BMI Calculator
Standard & metric body mass index calculations.
Mortgage Amortization
Visual loan payoff schedules & interest breakdowns.
EV Charging Cost
Charging cost and range added per session.
Budget & Cash Flow Planner
Monthly income split across spending categories.
Mortgage Pro Estimator
Extra payments, PMI, and full amortization detail.
Target Heart Rate Zones
Target training zones from your resting rate.
Emergency Fund Planner
Months of expenses to keep in reserve.
Body Fat %
US Navy physical body fat estimation method.
Net Worth & Liquidity Planner
Assets minus liabilities, itemized.
Blood Alcohol Content
Widmark formula BAC estimation over time.
BMR & TDEE
Basal Metabolic Rate profiling for energy needs.
Body Type
Somatotype morphology analysis and categorization.
Breast Cancer Risk (Gail Model)
NCI-validated Gail Model risk estimator.
Calorie Calculator
Total daily energy expenditure based on activity.
Calories Burned
MET-based specific activity tracking.
CHADS2 Score
Clinical stroke risk assessment methodology.
Colorectal Cancer Risk
Freedman model clinical risk assessment.
Pregnancy Due Date
Gestational timeline and milestone estimation.
HAS-BLED Score
Major bleeding risk scoring system.
Investment Growth
Compound interest and portfolio growth forecasting.
ISTH Bleeding Assessment Tool
Standardized bleeding assessment tool.
Lean Body Mass
Fat-free muscle mass estimation formulas.
Macronutrient Calculator
Targeted Protein/Carb/Fat ratio goal setting.
Melanoma Risk
Clinical skin cancer risk point scoring.
Mortgage Calculator
Comprehensive P&I, property taxes, and insurance.
Ovulation Calculator
Fertility window and conception tracking.
Loan Payment
Standardized monthly payment modeling.
Period Tracker
Cycle length prediction and logging.
Retirement Calculator
Long-term future savings and withdrawal planner.
Debt Payoff: Snowball vs Avalanche
Snowball vs avalanche payoff comparison.
Rent vs Buy
Cumulative rent vs buying net cost, with breakeven year.
Inflation-Adjusted Savings
What your savings will really be worth in today's money.
Take-Home Pay (US)
US federal tax + FICA net pay estimate.
Savings Goal Calculator
Required monthly contribution to hit a target.
Home Electricity Cost
Monthly electricity cost across your appliances.
Appliance Running Cost
Day/month/year running cost for one appliance.
Solar Payback Calculator
Years until a solar system pays for itself.
Fuel vs EV Cost Comparison
Gas vs electric cost per mile driven.
Waist-to-Height Ratio
Waist-to-height ratio against its health cutoff.
Calorie Deficit Planner
Daily deficit needed to reach a goal weight.
Protein Intake Calculator
Daily protein target from weight and training load.
Water Intake Calculator
Daily hydration target from weight and activity.
Sleep Debt Calculator
Sleep debt accumulated across the week.
Meeting Cost Calculator
What a meeting costs in salary, ticking live.
SaaS Runway & Burn Rate
Months of cash left at your current burn rate.
Subscription Cost Tracker
What your subscriptions really cost over 5 years.
Time Savings / Automation ROI
Dollar value of a small daily time savings.
Creator RPM / Revenue Calculator
Content revenue from views and RPM.
Tip Calculator
Tip amount and the per-person split.
Molarity Calculator
Mass, volume, and molarity of a solution.
Dilution Calculator
Stock-to-final-concentration dilution volumes.
Lab Unit Converter
Clinical lab values between SI and US units.
Stop showing blank fields to people you already know.
Point a webhook at your own API and a calculator opens pre-filled with a specific visitor's real numbers — their income, their height, whatever your system already has.
- 1Your API returns a plain JSON object for whichever visitor is loading the page.
- 2We fetch it server-side on every load — never from the visitor's browser, never exposing your auth token.
- 3Matching keys pre-fill the calculator. Anything your endpoint is slow, down, or wrong about just falls back to normal defaults — silently.
Without a webhook
Weight (kg)
Height (cm)
With your webhook
Weight (kg)
Height (cm)
"weight": 82,
"heightCm": 178
}
Simple, usage-based pricing
Every plan gets all 49 calculators, styled to match your site. Start free, upgrade when you outgrow the quota.
Free
For trying it out — no card required.
- 100 calculator loads / month
- All 49 calculators, every theme
- Unlimited domains
Base
For a site with real traffic.
- 2,000 calculator loads / month
- Everything in Free
- Email support
Extra
Feed calculator inputs from your own API.
- 10,000 calculator loads / month
- Everything in Base
- Webhooks — connect your own API to a calculator's inputs, so it opens pre-filled with your visitor's real data instead of blank defaults
Need the technical details? Read the API docs
No code — just a block, a widget, or a shortcode.
Every calculator is also a native WordPress block, an Elementor widget, and a shortcode — same API key, same live rendering, no iframe, nothing to build.
ExactCalcs Calculator
Embed any of 49 calculators