SmartBelt Calculator

Upgrade smarter. Train harder.
Fast, accurate credit math for martial arts schools.

New to SmartBelt?

What is SmartBelt

SmartBelt is an internal upgrade calculation tool for martial arts schools. It replaces fragile spreadsheets with exact, rules-based math so staff can calculate credit, time remaining, and upgrade options quickly and consistently. No formulas to break. No estimates. Just precise numbers you can stand behind.

See It In Action

See how SmartBelt calculates exact credit and upgrade options in real time. Designed so both experienced and brand-new staff can run upgrades confidently.

Video Coming Soon

Recommendations

“We have used this program calculator to get accurate numbers for hundreds of customers accounts. It has saved my employees hundreds of hours across our four locations.”

— Caleb C.

School Owner

“I love the calculator, the efficiency at which I can get things done is astounding. It also has so much flexibility that I can adjust things based on any family that comes in.”

— Brandon H.

School Manager/Head Instructor

“Using the program calculator to calculate customer credit is a game-changer. It's fast, accurate, and has saved me so much time.”

— Jennifer F.

Director of Operations

“I always worry about my math being off, but the program calculator has taken that stress away. It's reliable, easy to use, and honestly saves me so much time.”

— Kaylynn J.

School Manager/Program Director

“The program calculator has made my life so much easier! It saves me tons of time and takes the guesswork out of daily tasks. My appointments and daily setup runs smoother and more efficiently because of it. It’s a complete game changer.”

— Ashlyn F.

Regional Manager/Program Director

"Its been a light in the darkness. I was lost but now am found. Finger-lickin good.”

— Bryce E.

Assistant Manager/Lead Instructor

What’s New

SmartBelt is actively maintained and improved based on real-world use in schools.

Mar 25, 2026 Savable Number History, Settings Improvements, Calculation Guide Added savable number history, Legacy Program numbers added to settings page, and a new Calculation Guide can be accessed via the calculator pages as well as the settings.

2025

Dec 11, 2025 Instant Cross-Device Settings Updates Changes to program names and color themes now update on all your devices right away, without needing to reopen the Settings page.

Dec 11, 2025 Holiday Extension Down-Payment Modes Added support for two ways to apply down payments during Holiday Extensions: Partial Down only counts the portion of the down payment that matches the number of months selected, while Full Down applies the entire down payment right away regardless of the extension length.

Dec 8, 2025 Smart Clear on Inputs + Undo Clear Inputs includes a one-click Undo to instantly restore cleared values.

Nov 20, 2025 New Settings Program Option colors can now be chosen to better fit individual school's branding.

Oct 26, 2025 Profile creation Profiles must now be verified through their email before being permitted to login.

Oct 15, 2025 Clear All Button Quickly resets the calculator outputs no need to refresh or delete manually.

Oct 10, 2025 Smarter Settings Page Now supports editing program names, and syncs instantly after saving.

Oct 8, 2025 Price Plateaus + Info Popups on Custom Pricing Visual plateaus added with popups explaining how pricing adjusts across programs.

Aug 28, 2025 Full Color Refresh New branded color palette applied across buttons, sliders, and layout for a consistent look.

Aug 19, 2025 Extended Time Guarantee Added new header, results box, and “Copy Results” button for faster notation in profiles.

Aug 8, 2025 Settings Page Rudimentary implementation of stored program prices.

Jul 15, 2025 Mobile Layout Reorganized spacing on mobile to be more user friendly.

2024

Oct 21, 2024 Extended Time Guarantee Added ability to calculate time between two dates.

Jan 1, 2024 Custom Pricing Slider NEW ability to calculate custom pricing based off of any desired monthly value

2023

Oct 16, 2023 Calculator Created Finally made the jump from spreadsheets to a website.

Meet the Developer

Hi, I’m Braxton Hartmann. When I started as a Program Director, upgrade math made sense, but it felt vague, especially figuring out how much time a student had left. I wanted it to be easy peasy lemon squeezy, but it was difficult difficult lemon difficult.

I built a spreadsheet to help, but one misclick could break formulas. So I put my computer science degree to work and built SmartBelt to make upgrade math fast, accurate, and easy.

Why this exists

Upgrades require accuracy and trust. SmartBelt ensures credit is calculated fairly, pricing remains consistent, and staff can focus on the conversation instead of the math.