Tab Mapper
The tab mapper is a handy little tool that will render a guitar tab file with graphic chord diagrams displayed alongside. This comes in handy for people who just don't have every single chord shape memorized. Just plug in the web site address of a valid .tab or .crd file and hit "Go". In general, the tab mapper does a better job with printer friendly URLs. If there is more than one way to play a chord, the tab mapper will choose the most common shape. To see other fingerings, click on the chord diagram and you will be taken to the chord calculator.
Original file located @ http://calcsprint.com.
Show me scales that sound good with the chords in this song: A.
Skip to contentCalcSprint
Speed math drills · 4 levels · endless
Play
Use keyboard or the on-screen keypad
Session stats
No accounts. Nothing saved to a server.
About CalcSprint
Simple training for faster mental math
CalcSprint is a lightweight mental math game designed for quick practice sessions. Choose one of four difficulty levels and solve an endless stream of arithmetic tasks with instant feedback. It works on desktop and mobile, supports both physical and on-screen keyboards, and stays intentionally minimal?no sign-ups, no leaderboards, no distractions.
Use CalcSprint for daily warm-ups, focused accuracy training, or speed-building sprints. If you want structured tips, scroll down to the blog?short, practical notes that help you improve without overthinking.
FAQ
Quick answers, no fluff
A simple browser game for mental math. Pick a level and solve endless problems with instant feedback.
Does it save my progress?No. This version is intentionally minimal: no accounts, no leaderboards, no server-side storage.
How does division work?Division tasks are generated to always produce whole-number answers (no fractions).
Is it mobile-friendly?Yes. The layout switches to a single-column view and the keypad buttons are sized for touch.
Can I host it anywhere?Yes. It?s a static site. Upload the folder to any static host (Cloudflare Pages, Vercel, Netlify, GitHub Pages).
Blog
Short notes on mental math and practice
Mental Math Basics: The 3 Habits That Matter
Small techniques that make you noticeably faster within a week of practice.
A Simple 4-Level Training Plan
How to move through levels without burning out (and what to do when you plateau).
How to Get Faster Without Making More Mistakes
Speed comes from patterns, not rushing. Here?s a clean way to build accuracy first.
Addition Shortcuts: Make 9s and 19s Easy
The fastest mental math comes from turning awkward numbers into friendly ones.
Subtraction Tricks: Borrow Less, Think More
Subtraction feels slow when you try to do it like on paper.
Multiplication Patterns You Can Memorize in 10 Minutes
You don?t need to memorize everything?just a few patterns.