Rationa - party calculator

Plan your event with confidence and avoid unnecessary costs.

Rationa is a smart party calculator that helps you estimate exactly how much food and drinks you need for any event. Whether you’re hosting a barbecue, birthday, wedding, or New Year’s party, Rationa gives you fast, reliable estimates in seconds.

Stop overspending on food and drinks you don’t need.
Stop running out when it matters most.

With Rationa, you buy smarter, waste less, and stay in control of your event budget.

Simply choose your event type, number of guests, and location, and Rationa calculates the total amount of food, alcohol, and non-alcoholic drinks you should prepare.

🎯 KEY FEATURES

• Fast event calculator
Get instant estimates for food and drinks based on your event details.

• Multiple event types
Supports barbecue, birthdays, weddings, baptisms, New Year’s events, and more.

• Smart quantity estimates
Balanced calculations designed to help you avoid overspending and reduce waste.

• Indoor & outdoor adjustments
Different conditions, different needs — Rationa adapts automatically.

• Clean and simple interface
A smooth, modern experience designed for quick planning.

• Save your history
Keep track of past calculations and revisit them anytime.

• Metric & imperial units
Use the system you prefer.

💸 SAVE MONEY & REDUCE WASTE

Planning an event often leads to buying too much “just in case.”
That means wasted food, wasted drinks, and wasted money.

Rationa helps you find the right balance.

By giving you accurate estimates, the app helps you:
• avoid overbuying
• reduce food waste
• stay within your budget
• plan with confidence

🍽️ PERFECT FOR

• Parties and gatherings
• Weddings and large events
• Family celebrations
• Barbecues and outdoor events
• Anyone who wants to plan food and drinks efficiently

🚀 WHY RATIONA

Planning food and drinks for an event can be stressful and expensive.
Rationa turns it into a simple, fast, and reliable process.

Instead of guessing quantities, you get a clear estimate tailored to your event.
This means less waste, better planning, and real savings.

💎 PREMIUM FEATURES

Unlock a smarter way to plan your events with advanced tools:

• Detailed food and drink breakdowns
Get more precise estimates for different categories.

• Personalized consumption profiles
Adjust calculations based on your guests.

• Time and season adjustments
Adapt estimates depending on when your event takes place.

• Advanced planning control
Fine-tune safety margins and planning preferences.

Upgrade to premium for more accurate planning, better insights, and complete control over your event.

Start planning smarter, spend less, and waste less with Rationa.