Last updated: March 30, 2026

Overview

headlosscalculator.com is a hydraulic engineering tool. We are committed to protecting your privacy and being transparent about what data we collect and how we use it.

Cookies We Use

Essential Cookies (Required)

These cookies are necessary for the site to function and cannot be disabled:

Session cookie — Keeps you logged in securely. Encrypted, HTTP-only, expires after 14 days of inactivity.
CSRF token — Prevents cross-site request forgery on form submissions. Required for security.

No Tracking or Third-Party Cookies

We do not use:

Google Analytics or any other analytics tracking
Advertising cookies or marketing pixels
Social media tracking scripts
Third-party cookies of any kind

Local Storage (Browser)

We use your browser's local storage to save your preferences and work-in-progress data locally on your device. This data never leaves your browser and is not sent to our servers. It includes:

Theme preference — Your light/dark mode choice
Font size setting — Your preferred text size
Form auto-save — Draft inputs so you don't lose work if you navigate away
Saved scenarios — Your headloss calculation scenarios
Panel states — Which sections are expanded or collapsed
Cookie consent — Whether you've seen this notice

You can clear this data at any time through your browser settings.

Account Data

When you create an account, we store:

Email address — Used for authentication and account recovery
Profile information — Name, company, phone (optional, provided by you)
Subscription status — Your plan tier and billing state
Saved calculations — Scenarios you choose to save to your account

Payment Processing

Payments are processed securely by Stripe. We never see, store, or have access to your credit card number or bank details. Stripe's privacy policy governs their handling of your payment data.

Data Sharing

We do not sell, rent, or share your personal data with any third parties, except:

Stripe — For payment processing only
Quote requests — When you request a pump quote, your contact information and system requirements are shared with the selected manufacturer

Data Security

All connections are encrypted via HTTPS/TLS
Session cookies are encrypted and HTTP-only
Passwords are hashed (never stored in plain text)
Content Security Policy (CSP) headers prevent unauthorized scripts
CSRF protection on all form submissions

Your Rights

You can:

Access your data through your account page
Delete your account and all associated data by contacting us
Export your saved calculations at any time
Clear local browser storage through your browser settings

Contact

For privacy questions or data deletion requests, contact us at info@headlosscalculator.com.