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Bid Simulator

Simulate how bid changes affect your clicks, conversions, revenue, and ROAS. See 5 bid scenarios side-by-side and find your optimal bid before spending a euro.

5 bid scenarios

Optimal bid highlighted

Revenue bar chart

Enter Your Current Campaign Data

All calculations run instantly in your browser — no data is sent anywhere.

Current CPC

Clicks / Month

Conversions / Month

Conv. Value

Bid Scenario Comparison Optimal scenario highlighted in blue

Scenario	CPC Bid	Monthly Spend	Est. Clicks	Est. Convs	Revenue	ROAS	Status
Enter your data above to simulate bid scenarios

How It Works

How the bid simulation works

The simulator uses a modified bid-volume curve model based on Google Ads auction dynamics.

1

Bid elasticity model

Higher bids win more auctions, increasing impression share and clicks. Lower bids lose auctions. The model uses a non-linear elasticity curve: a 20% bid increase typically yields 15–25% more clicks, not a linear 1:1 ratio.

2

Conversion rate stability

Your conversion rate stays roughly constant across bid scenarios (it depends on your landing page and audience, not your bid). More clicks at the same CVR = proportionally more conversions.

3

Optimal bid = best ROAS

The optimal scenario is the one with the highest ROAS — meaning you're getting the best return for every euro of ad spend. This may not be the highest revenue scenario, but it is the most efficient.

Bid Strategy Tips

When to raise vs. lower bids

📈

Raise Bids When...

Your ROAS is above target and you're losing Impression Share to budget or rank. Raising bids captures more of the available market before competitors do. Check IS metrics in Google Ads first.

📉

Lower Bids When...

Your ROAS is below target or you're over-spending on a campaign that isn't converting. Lowering bids reduces wasted spend on low-quality clicks and reallocates budget to better-performing campaigns.

🤖

Use Smart Bidding for Automation

Once you have 30+ conversions/month, Target ROAS or Target CPA bidding outperforms manual bids. Set your target based on your break-even ROAS and let Google's algorithm optimize in real-time.

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Related guides

Google Ads Smart Bidding: Complete Strategy Guide

The complete guide to Google Ads Smart Bidding — Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value. When to use each, data requirements, learning periods, and common mistakes.

Google Ads Forecasting: Predict Campaign Performance with AI

How to forecast Google Ads performance, estimate ROAS, set realistic budgets, and use AI to predict results before committing spend.

Related articles

Average CPC by Platform 2026: Google Ads vs Meta vs LinkedIn vs Indeed vs TikTok

How Much Does Google Ads Cost in 2026? Real Pricing Data by Industry

Google Ads Smart Bidding: Target ROAS vs Target CPA vs Maximize Conversions (2026 Guide)

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