Welcome to Spantally
A thoughtfully crafted collection of calculators, converters, and everyday utilities — designed to be fast, private, and a pleasure to use.
What You Can Do
Every tool is just a click away — no sign-up required.
Stopwatches & Timers
Run multiple stopwatches and countdown timers side by side, each fully independent.
Time Zone Tools
Compare and convert times across time zones with an intuitive interface.
Date Calculator
Calculate the exact duration between two dates or from today to any target date.
My Age
Get your precise age in years, months, days, hours, minutes and seconds — updated live.
Zodiac Finder
Discover your Western and Chinese zodiac signs based on your birth date.
Unit Converter
Convert between hundreds of units across length, mass, volume, temperature, and more.
Loan Calculator
Compare monthly, biweekly, and weekly payment plans with optional extra payments.
Interest Calculator
Compute compound interest for any principal, rate, and time period with optional regular contributions.
BMI Check
Quickly calculate your Body Mass Index and see the weight category at a glance.
Currency Converter
Convert between 30 major world currencies using up-to-date exchange rates.
QR Code Generator
Create custom QR codes with logos, colors, and text overlays — download as PNG or JPG.
Why Use Spantally?
Built with care — for everyone.
Fast & Lightweight
Pages load instantly and calculations happen right in your browser.
100% Private
All calculations run on your device. No accounts, no personal data collection. Optional analytics with your consent.
Fully Customisable
Switch between light and dark themes with one click. Save your results with session persistence.
Completely Free
Every tool is available at no cost — no hidden charges, premium tiers, or usage limits.
Your Privacy Matters
Spantally is designed to respect your privacy completely. No personal data is collected, stored, or transmitted. All calculator inputs are processed locally on your device — none of your entries ever leave your browser. The site does communicate with our servers to load pages and assets (like any website), and some tools may fetch publicly available reference data (e.g., live exchange rates) — but your personal input and calculation results are never sent anywhere. We use privacy-friendly analytics (Plausible and PostHog, both cookieless and EU-compliant) to measure aggregated site traffic, plus Google Analytics 4 which you can opt into via the cookie banner — no personal identifiers are collected.
No accounts
No sign-up needed
No personal data
Optional analytics with consent
Local only
Everything runs in-browser
All tools on Spantally are provided for informational and entertainment purposes only. Results should not be taken as fact, professional advice, or precise measurements. Always double-check critical calculations with authoritative sources and consult qualified professionals for financial, medical, legal, or other important decisions.
While we strive for accuracy, Spantally makes no guarantees about the correctness, completeness, or reliability of any calculation, conversion, or tool output. Use at your own discretion.