Live calculators
8
Active tools you can open immediately.
KTP calculator
Practical decision supportEveryday math, designed to feel clear before it feels clever.
A calculator workspace for money, dates, and conversions that gives fast answers, saves progress locally, and explains the number you are about to trust.
Discovery paths
4
Problem groups for faster browsing.
Featured launch set
8
High-frequency tools surfaced first.
Browse the workspace
The landing page is organized to match real tasks: find a tool, resume work, inspect a featured calculator, then verify how the product is built.
Launch focus
Real calculators for the kind of math people usually re-check twice.
The release prioritizes shopping, borrowing, tipping, date planning, and unit changes. Each tool is designed to be deterministic, fast on mobile, and understandable without translating formulas in your head.
Decision pattern
Input, confirm, act
Clean forms, immediate validation, and result summaries that explain what changed.
Recovery model
Local drafts plus shareable links
You can recover interrupted work or pass exact calculator state to someone else.
Problem categories
Start from the question, not the formula.
Browse logic
Each category acts like a browse path into the live explorer, so the first step is choosing the kind of problem you need to resolve.
Problem path
Everyday money
Discounts, markup, tip, tax, and quick percentage math for purchase decisions.
Live tools
5 available now
Problem path
Borrowing
Loan and mortgage estimates that show the monthly impact before you commit.
Live tools
1 available now
Problem path
Time and dates
Age, due dates, and date differences without spreadsheet detours.
Live tools
1 available now
Problem path
Conversions
Unit and rate changes with assumptions made visible instead of buried.
Live tools
1 available now
Recent work
Resume drafts and review the latest saved calculations.
Drafts restore after a refresh, and successful calculations stay visible as a short local history on this device.
Session activity
No local activity
Pinned favorites
0
Exact calculator setups you chose to keep handy.
Saved drafts
0
In-progress calculator states waiting to be resumed.
Recent results
0
Successful calculations kept in local device history.
Latest activity
No local activity
Most recent draft save or successful calculation on this device.
Pinned favorites
Keep repeat scenarios one tap away
No favorites yet
Pin a recent result to keep that exact setup close by. It will appear here for quick access.
Featured calculators
High-frequency tools, surfaced like a launch collection instead of a flat list.
These are the calculators most likely to answer a practical question quickly, with room to branch into related tools when the problem shifts.
Expression calculator
Launch setLive now
Evaluate everyday arithmetic expressions without spreadsheet detours.
Example: 12.5 * (4 - 1.5), 125 / 8, (18 + 7.2) / 3
Percentage change
Launch setLive now
Show how much something moved in absolute and percent terms.
Example: 79 to 92, traffic up 18%, salary from 42000 to 45750
Salary and take-home
R2 priorityLive now
Project salary, wage, and take-home pay with a flat withholding model and visible cadence assumptions.
Example: $72,000 salary, 24% withholding, or $42/hour at 32 hours per week
Discount and markup
Launch setLive now
Work out sale price, margin pressure, and target markup with no guesswork.
Example: 25% off 68, then add 8.5% tax
Tip and total
Launch setLive now
Split bills and tip cleanly with tax-aware totals for fast checkout decisions.
Example: dinner total 64.80, tip 18%, split 3 ways
Loan payment
R1 priorityLive now
Estimate monthly payment and total paid with the assumptions called out.
Example: 280000 loan, 6.4% APR, 30 years
Unit conversion
R1 priorityLive now
Convert distance, weight, volume, and speed without ambiguous labels.
Example: miles to km, pounds to kg, mph to m/s
Age and date difference
R1 priorityLive now
Answer date-span questions quickly for planning, paperwork, and deadlines.
Example: days until May 15, age from a birth date
Deterministic
Same input, same answer
Every calculator is designed around explicit parsing, validation, and pure formula execution.
Readable
No black-box math
Results are paired with plain-language explanations so users understand the number they are seeing.
Fast
Built for low-friction decisions
The initial release is client-first and tuned for instant updates on desktop and mobile.
Release path
Ship in small steps, with verification attached to each milestone.
The roadmap is intentionally compact: establish the shell, ship the core calculator set, deepen verification, then improve repeat-use workflows.
R0
Step 1Product shell
Calculator-focused landing experience, design system, and governance in place.
R1
Step 2Core calculators
Expression, percentage, money, and conversion flows become usable end to end.
R2
Step 3Verification depth
Typed calculator contracts, deterministic fixtures, and mobile/browser release gates.
R3
Step 4Route resilience
Route fallbacks, metadata coverage, and production-facing polish for release handling.
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